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Balbharti Maharashtra State Board Class 8 Science Solutions Chapter 19 Life Cycle of Stars Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 8 Science Solutions Chapter 19 Life Cycle of Stars

Class 8 Science Chapter 19 Life Cycle of Stars Textbook Questions and Answers

1. Search and you will find:

Question a.
Our galaxy is called ………… .
Answer:
Our galaxy is called the Milky Way and Mandakini.

Question b.
For measuring large distances, ………… is used as a unit.
Answer:
For measuring large distances, the light year is used as a unit.

Question c.
The speed of light is …………. km/s.
Answer:
The speed of light is 300000 km/s.

Question d.
There are about ………… stars in our galaxy.
Answer:
There are about 100 billion stars in our galaxy.

Question e.
The end stage of the Sun will be …………. .
Answer:
The end stage of the Sun will be a white dwarf.

Question f.
Stars are born out of ………… clouds.
Answer:
Stars are born out of interstellar clouds.

Question g.
Milky way is a ………. galaxy.
Answer:
Milky way is a spiral galaxy.

Question h.
Stars are gigantic spheres of ………… gas.
Answer:
Stars are gigantic spheres of hot gas.

Question i.
The masses of other stars are measured relative to the mass of the …………. .
Answer:
The masses of other stars are measured relative to the mass of the Sun.

Question j.
Light takes ……………. to reach us from the Sun while it takes …….. to reach us from the moon.
Answer:
Light takes about 8 minutes to reach us from the Sun while it takes about 1 second to reach us from the moon.

Question k.
The larger the mass of a star, the faster is its ……….. .
Answer:
The larger the mass of a star, the faster is its evolution.

Question l.
The number of fuels used in the life of a star depends on its …………. .
Answer:
The number of fuels used in the life of a star depends on its mass.

2. Who is telling lies?

Question a.
Light year is used to measure time.
Answer:
False. (Light year is used to measure distance.)

Question b.
End stage of a star depends on its initial mass.
Answer:
True.

Question c.
A star ends its life as a neutron star when the pressure of its electrons balances its gravity.
Answer:
False. (A star ends its life as a neutron star when the pressure of its neutrons balances its gravity.)

Question d.
Only light can emit from the black hole.
Answer:
False. (Not even light can be emitted by a black hole.)

Question e.
The Sun will pass through the supergiant stage during its evolution.
Answer:
False. (The Sun will pass through the red giant stage during its evolution.)

Question f.
The Sun will end its life as a white dwarf.
Answer:
True.

3. Answer the following question:

Question a.
How do stars form?
Answer:
There are huge clouds of gas and dust in the empty spaces between the stars in a galaxy. These clouds are called interstellar clouds. The size of an interstellar cloud is about a few light years.

When an interstellar cloud starts contracting due to some disturbance, its density and temperature increase. This results in formation of a dense sphere of hot gas and nuclear energy generation starts at the centre of the star. Therefore, the gas sphere becomes self-luminous. Thus a star is formed, i.e., a star is born.
A huge interstellar cloud can produce thousands of stars at a time.

Question b.
Why do stars evolve?
Answer:
Although stars appear stable for quite a long period of time, their properties do change, though very slowly. A change in the properties of a star, leading to its passing through different stages, is called evolution of the star. Burning of the fuel at the centre of the star and a gradual decrease in its amount is the main reason of evolution of a star.

Question c.
What are the three end stages of stars?
Answer:

1. Stars having initial mass less than 8 times the mass of the Sun ultimately become white dwarfs.
2. Stars having initial mass between i 8 and 25 times the mass of the Sun ultimately become neutron stars.
3. Stars having initial mass larger than 25 times the mass of the Sun ultimately turn into black holes.

Question d.
Why was the name black hole given?
Answer:
When a star having initial mass larger than 25 times the mass of the Sun reaches its end stage, its gravitational force and density increase exponentially. All nearby objects get attracted towards the star and nothing can come out of it, not even light. All incident light is absorbed by the star. We can probably see a very minute black hole at its place. Hence, the name is given as black hole.

Question e.
Which types of stars end their life as a neutron star?
Answer:
Stars having initial mass between 8 and 25 times the mass of the Sun end up as neutron stars. When these stars pass through ( the supergiant stage, their size increases to 1000 times. Huge explosion that occurs in the last stage of these stars is very powerful and very high energy is given off. After the huge explosion, called the supernova explosion, their central portion contracts in size to about 10 km. In this stage, such stars are completely made up of neutrons and hence are called neutron stars.

4. A. If you are the Sun, write about your properties in your own words.
B. Describe white dwarfs.

Question A.
If you are the Sun, write about your properties in your own words.
Answer:

If you are the Sun, write about your properties in your own words.
Answer:
There are billions of stars in the galaxy called the Milky Way and Mandakini. I am one of the small stars called the Sun. I have my own family called the solar system. There are planets, satellites, asteroids, comets and meteors in my family. My mass is 2 × 1030 kg which is about 3.3 lakh times that of the earth. With a radius of 695700 km, my size is about 100 times that of the earth. My surface temperature is about 5800 K while it is 1.5 × 107 K at the centre.

72 % of my mass consists of hydrogen while 26 % consists of helium. Rest 2 % is made up of elements heavier than helium. I am about 4.5 billion years old and the scientists on the earth have concluded that not much change has taken place in my properties during this period. According to the scientists, in the end stage of my life, I will turn into a red giant star. Thereafter, I will first explode and then contract to become as small as the earth. I will appear small as well as white and hence, I will be called a white dwarf. This will be my last stage for ever.

Question B.
Describe white dwarfs.
Answer:
Depending on the initial mass, stars can reach one of the three end stages. White dwarf is one such stage of stars having initial mass less than 8 times the mass of the Sun. These stars undergo huge expansion and their radius increases by a factor of 100 to 200. These stars appear reddish because of their large size and lower temperature. Hence, these stars are also called red giant stars.

At the end of their evolution, these stars explode, their outer gas envelope is thrown outward and the inner part contracts to the size of the earth. However, the density in the star becomes very high. In this stage, the pressure due to electrons becomes independent of temperature and sufficient to balance the gravitational force for ever.

In this stage, such stars look white and due to their small size they are called white dwarfs.

Can you recall?

Question 1.
What is a galaxy?
Answer:
A system of billions of stars, their planetary systems and interstellar clouds of gas and dust held together by gravitational attraction is called a galaxy.

Question 2.
What are the different constituents of our solar system?
Answer:
The different constituents of our solar system are as follows :

1. Sun as a star.
2. Eight planets, namely, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune; of which Mercury, Venus, Earth and Mars are made up of rocks and minerals, while Jupiter, Saturn, Uranus and Neptune are made up of gases.
3. Natural satellites of some planets revolving around the respective planets.
4. Asteroids located between Mars and Jupiter.
5. Comets made up of ice, dust and gases.
6. Meteors and meteoroids.

Question 3.
What are the major differences between a star and a planet?
Answer:

1. Nuclear/atomic explosions regularly take place at the centre of stars. This causes the discharge of heat and light. Hence, stars shine. Planets do not discharge any light. They are visible due to the light reflected by them.
2. Stars are very big in size and massive relative to planets.
3. Stars twinkle, planets do not.
4. Stars are made up of hydrogen, helium and other light elements.
5. Planets are made up of solid, liquid or gaseous substances or a combination thereof.

Question 4.
What is a satellite?
Answer:
An astronomical object orbiting a planet is called a satellite.

Question 5.
Which is the star nearest to us?
Answer:
The star nearest to us is the Sun.

Project:

Question 1.
Use your imagination and make models of the Milky Way and the solar system.
Answer:
N.B. Students can make these models and display the same in science exhibition. You can use sand, scrap material, stones, pebbles, marbles, pieces of glass, beads, etc.

Question 2.
Write the effects: If the Sun disappears ………..
Answer:
N.B. You can write the effects with the help of the following points:

1. No sunrise, no sunset, no beauty of morning and evening wee hours.
2. In the absence of the gravitational force due to the Sun, the earth will drift away in the galaxy.
3. Darkness, no source of energy, end of life on the earth.
4. Moon will be invisible.
5. The temperature of the earth will fall below the freezing point of water. All oceans will also freeze.
6. Even the atmosphere will freeze and fall on the earth. This will cause more cosmic rays to reach the earth.

Class 8 Science Chapter 19 Life Cycle of Stars Important Questions and Answers

Match the columns:

Question 1.

Column ‘A’	Column ‘B’
1. Gravitational force	a. Alpha Centauri
2. The star nearest to us other than the Sun	b. 2 × 1030 kg
3. Mass of the Sun	c. 10 30 g
	d. towards the centre of a star or a planet

Answer:

Column ‘A’	Column ‘B’
1. Gravitational force	d. towards the centre of a star or a planet
2. The star nearest to us other than the Sun	a. Alpha Centauri
3. Mass of the Sun	b. 2 × 1030 kg

Question 2.
Mass of the star:

Column ‘A’	Column ‘B’
1. < 8 MSun	a. Proton star
2. between 8 and 25 times MSun	b. Black hole
3. > 25 MSun	c. Neutron star
	d. White dwarf

Answer:
Mass of the star:

Column ‘A’	Column ‘B’
1. < 8 MSun	d. White dwarf
2. between 8 and 25 times MSun	c. Neutron star
3. > 25 MSun	b. Black hole

Answer the following questions in one sentence each:

Question 1.
Name the star nearest to the earth.
Answer:
The Sun.

Question 2.
Other than the Sun, which is the star nearest to the earth?
Answer:
Alpha Centauri.

Question 3.
What would be the last stage of the Sun?
Answer:
The last stage of the Sun would be white dwarf.

Question 4.
Name two forces that act on any star.
Answer:
Gravitational force and the force due to the pressure of hot gas are the two forces that act on any star.

Question 5.
What is a black hole?
Answer:
A black hole is the end stage of a quite big star, where due to the extremely high gravitational force, nothing, not even light, comes out.

Answer the following questions:

Question 1.
How is stability of stars maintained?
Answer:
Properties of a star remain unchanged for quite a long time. The gravitational force and the force due to the pressure of the hot gas act together on a star. The gravitational force acts towards the centre of the star and tries to bring the gas particles close together. Hot gas shows the tendency to spread and its force acts away from the centre of the star. This force tries to disperse the gas particles. A balance between the gravitational force and the force due to the hot gas keeps the star stable.

However, if the magnitude of any one force is more than that of the other force, the star either contracts or expands depending upon which force dominates.

Question 2.
Why is the Sun called an ordinary star?
Answer:
The star nearest to the earth is the Sun. Hence, it appears quite big and bright. There are billions of stars in our galaxy called the Milky Way and Mandakini which are greater or lower in mass, size and temperature than the Sun. Hence, the Sun is called an ordinary star.

Do you know?

When the Sun will become a red giant, its diameter will increase so much that it will swallow Mercury and Venus. It is possible that the earth will also be absorbed by the Sun. It will take about 4-5 billion years for the Sun to reach this state.

Question 3.
Describe various stages of evolution of star.
Answer:
Though the properties of a star remain unchanged for quite a long time, this situation is never static. A star passes through different stages. This process is called the evolution of a star.
Important stages of the evolution of a star are as follows:

1. Initial stage of stability: The gravitational force and the force due to the pressure of the hot gas act together on a star. The gravitational force acts towards the centre of the star and tries to bring the gas particles close together. Hot gas shows the tendency to spread and its force acts away from the centre of the star.

This force tries to disperse the gas particles. A balance between the gravitational force and the force due to the hot gases keeps the star stable, as long as the energy generation continues at the centre of the star.

2. Burning of the fuel: As a star continuously emits energy, its energy constantly decreases. When the fuel at the centre of the star is exhausted, the energy generation stops and the temperature of the star starts decreasing. Decreasing temperature causes the gas pressure to decrease and the balance between the gravitational force and the force due to the gas pressure is no more maintained.

As the magnitude of the gravitational force is now more than that of the force due to the gas pressure, the star starts contracting. This causes another fuel to start burning, e.g. on exhausting hydrogen, helium starts undergoing fusion. Availability of multiple fuels depends on the mass of the star.

The higher the mass of the star, the more is the number of fuels used. The star either contracts or expands during the course of using these fuels. This may cause the imbalance between the gravitational force and the force due to the hot gas.

3. Total exhaustion of the fuel: When all fuels are exhausted, the energy generation in the star finally stops completely and the temperature of the star starts decreasing. The balance between the gravitational force and the force due to the gas pressure can no more be maintained. The evolution of the star ends and the star proceeds to its end stage.

4. End stage of a star: Once the fuel in the star is totally exhausted, the energy generation in the star stops and subsequently the gas pressure decreases, the star starts contracting and its density starts increasing. When the density becomes very high, some new types of pressures are generated which are independent of the temperature of the gas.

In such a case, the pressure remains stable despite low temperature and absence of any energy generation and thus the star remains stable for ever. This stage is the end stage of the star. Depending on the initial mass, stars can reach one of the three end stages.

• Stars having initial mass less than 8 times the mass of the Sun ultimately become white dwarfs.
• Stars having initial mass between 8 and 25 times the mass of the Sun ultimately become neutron stars.
• Stars having initial mass larger than 25 times the mass of the Sun ultimately turn into black holes.

Write short notes on the following:

Question 1.
End stages of stars having initial mass less than 8 times the mass of the Sun.
Answer:
These stars undergo huge expansion and their radius increases by a factor of 100 to 200 during their various stages of evolution. These stars appear reddish due to their lower temperature. Hence, they are called red giant stars.

At the end of evolution, these stars explode, their outer gas envelope is thrown out and the inner part contracts roughly to the size of the earth. Hence, the density of the star becomes very high. In this stage, the pressure due to electrons becomes independent of temperature and sufficient to balance the gravitational force for ever. Such stars look white and due to their small size they are called white dwarfs.

Question 2.
End stage of the stars having mass between 8 and 25 times the mass of the Sun.
Answer:
These stars pass through the red giant stage and later super giant stage, during which their size may increase to 1000 times. The huge explosion, called the supernova explosion, occurs in the last stage of the evolution. It is very powerful and very high energy is given off in this case.

As a result, the stars are visible even during the day. Later their central portion contracts to about 10 km. In this stage, the stars are completely made up of neutrons and are called neutron stars. The pressure of these neutrons is independent of temperature and sufficient enough to balance the gravitational force for ever.

Question 3.
End stages of stars having mass larger than 25 times the mass of the Sun.
Answer:
After the supernova explosion, no pressure can balance the gravitational force. Hence these stars contract continuously and their gravitational force and density increase exponentially. All nearby objects get attracted towards these stars and not even light can come out of them. Light falling on these stars is completely absorbed by the star. We cannot see these stars. A very minute black hole is formed at the place of such a star. This is the end stage of these stars.

Balbharti Maharashtra State Board Class 6 Geography Solutions Chapter 10 Human Occupations Notes, Textbook Exercise Important Questions and Answers.

Maharashtra Board Class 6 Geography Solutions Chapter 10 Human Occupations

Class 6 Geography Chapter 10 Human Occupations Textbook Questions and Answers

A. Select the correct option:

Question 1.
Serving as a ______ is a tertiary type of occupation.(bus conductor, veterinary doctor, brick kiln worker)
Answer:
bus conductor

Question 2.
In the tropical areas, we mainly see ________ occupations. (primary; secondary, tertiary)
Answer:
primary

Question 3.
Amol’s Granny sells papads and pickles. This is a _______ occupation. (primary, secondary, tertiary)
Answer:
secondary

B. Give reasons:

Question 1.
The type of occupation determines a person’s
income.
Answer:
(i) Occupation is a job, a person’s role in society wherein a regular activity is carried out for income.

(ii) Certain occupations bring greater economic benefits to the society and the nation at large while certain occupations bring relatively less economic benefits.

(iii) Similarly some occupations require higher level of knowledge and skill while some can be carried out with little or no skill or expertise. Person’s income is proportionate to the economic benefit his occupation brings with it and the land of his knowledge and skill. So the type of occupation determines a person’s income.

Question 2.
Primary occupations are associated with developing countries while tertiary, with developed countries.
Answer:
(i) Countries which are developing have low income as they are in a state of development and their main source of income comes from production carried out in primary sector.

(ii) Developed countries are rich with high income and so they practice tertiary occupation. They have enough money to invest in business which creates tertiary occupations which requires huge investment.

Question 3.
Quaternary occupations are not commonly seen.
Answer:
Quaternary occupations are occupations which require special knowledge, skills and expertise. This sectorevolves in well-developed countries and requires skilled workforce apart from sufficient money to invest in fields like IT, research and development, quality testing, etc.

Activity:

• Visit a secondary occupation in your area.
• Gather information related to that occupation
• using the following points and note it down.
• Name of the occupation
• Raw material used
• Source of raw material
• Finished product
• Market for finished product
• Tertiary occupations required in it.

Class 6 Geography Chapter 10 Human Occupations InText Questions and Answers

Look at the figure and answer the following questions:




Question 1.
What are the cows and buffaloes in picture A doing?
Answer:
The animals, cows and buffaloes are grazing in the pasture, i.e. land covered with grass and other low plants.

Question 2.
What is being obtained in picture B?
Answer:
Milk is being obtained in picture B.

Question 3.
What is happening at the Milk Collection Centre in picture C?
Answer:
Milk is being filled for storage and sold at the milk collection centre.

Question 4.
In picture D, what is being transported? Where could the tanker be going?
Answer:
Milk is being transported to the milk processing centre. The tanker is on the truck

Question 5.
Which products are seen in picture E? From what have these products been made?
Answer:
Curd, ghee, butter, cheese and shrikhand are the products seen in picture E and these products have been made from milk.

Question 6.
What else is happening in picture E?
Answer:
In picture E, person is testing the quality of the prepared milk products.

Question 7.
Out of the products shown in picture F, which products do you use?
Answer:
I use all the products shown in picture F as milk products are high on nutrients and good for health.

Question 8.
What would be main difference between milk and milk products?
Answer:
Milk is a beverage obtained from nature, directly from different animals. While milk products are obtained by processing milk into different products.

Question 9.
Do these products perish quickly like milk?
Answer:
No, they have a longer life unlike milk.

Look at the figure and answer the following questions:

Question 1.
Which of these activities is undertaken to obtain a product from nature?
Answer:
Obtaining milk from the cow is the activity undertaken to obtain a product from nature.

Question 2.
How long does this product last?
Answer:
If refrigerated it will last for about five days to one week.

Question 3.
In which picture is the product obtained from nature being collected?
Answer:
In picture C, the product obtained from nature is being collected.

Question 4.
Which service did the milk producer get through this activity?
Answer:
Transport and unloading of milk, a tertiary service is the service which the milk producer received.

Question 5.
Where is milk being taken? What happens to the milk thereafter?
Answer:
The milk is being taken to the milk processing centre for processing milk to make milk products.

Question 6.
What milk products are seen in the picture?
Answer:
Ghee, butter, cheese, shrikhand are the products seen in the picture.

Question 7.
Who inspects these products?
Answer:
A food inspector, a person with special skill and expertise inspects these products.

Question 8.
What does the shopkeeper do with these products?
Answer:
The shopkeeper sells these products to the consumer.

Question 9.
Which of these products are perishable and which are non- perishable?
Answer:
All are the products, even after proper storage will deteriorate and perish over a period of time.

Question 10
Will the price and weight of these products be same as that of the milk?
Answer:
The price and weight of these products will be higher after processing. These products will be more durable and its quality too will be enhanced and so their price will be also higher.

Use your brainpower!

Question 1.
Milk is available at ₹ 40 per litre while dahi at ₹ 60 per kg and paneer at ₹ 200 per kg. If both are obtained from milk, why is there so much difference in their prices?
Answer:
Milk is being processed, obtained from nature and made it into different products. These products are more durable. Their quality its enhanced and therefore their price is higher.

Answer the following questions based on the pie charts:

Question 1.
Which country has more manpower engaged in primary occupation?
Answer:
Bangladesh.

Question 2.
Which country has more manpower engaged in secondary occupation?
Answer:
Turkey.

Question 3.
Which country has more manpower engaged in tertiary occupations?
Answer:
United Arab Emirates.

Question 4.
Which country has almost equal manpower engaged in all the occupations?
Answer:
Turkey.

Think a little!

Who am I?

Question 1.
Who examines us when we fall ill?
Answer:
Doctor

Question 2.
Who checks our examination papers?
Answer:
Teacher

Question 3.
Who prepares the designs of buildings?
Answer:
Architect

Question 4.
Who produces machines and looks after their maintenance and repairs?
Answer:
Engineer

Observe figure and answer the questions related to sugar production:



Question 1.
Classify the occupations from primary to quaternary
Answer:

Primary	Secondary	Tertiary	Quaternary
Harvesting of sugarcane	Sugarcane being collected at factory	Transport of sugarcane	Quality check
	Processing of sugarcane juice	Sacks of sugar being canned	Inspection and maintenance of machinery in the factory
	Sugar production	Sale of goods

Question 2.
Which raw material is used in the secondary occupation?
Answer:
Sugarcane is the raw material used in the secondary occupation.

Question 3.
Which is the finished product obtained in the secondary occupation?
Answer:
Sugar is the finished product obtained in the secondary occupation.

Question 4.
What are the services in tertiary occupations?
Answer:
Transport of sugarcane, sacks of sugar being carried and sales of goods are the services in tertiary occupations.

Question 5.
Which picture is related to a quaternary occupation? Can you name the occupation?
Answer:
Picture G is related to a quaternary occupation. The occupation is quality testing.

Think and discuss:

What effect does nature have on our occupations? Think a little. Give a thought to the following issues. Discuss them in the class. Write two paragraphs about it.

• There have been no rain at all (drought).
• A storm strikes
• There was an earthquake.
• Untimely rains
• Good rains
• Excessive rains and floods
• All of a sudden, a volcano erupts
• A tsunami hits.

Answer:
Primary occupations like agriculture can be totally disrupted if there are no rains or excessive rains while good rains will usher with good agricultural output. When we receive good agricultural yield it will have a positive input on all secondary occupations which rely on agriculture. It will bring about all-round growth in both agricultural and industrial sector.

Natural calamities like storms, earthquake, volcanoes and tsunami can have adverse impact on various occupations. It can bring all the primary, secondary, tertiary and quaternary occupations to a standstill. Occupations related to production, storage, distribution, etc. will be greatly affected as rescue and rehabilitation of the people and reconstruction of the damaged caused, becomes a priority.

Do it yourself!

Question 1.
Which occupations are found in your area?
Answer:
I live in Maharashtra and occupations like textile manufacture, manufacture of sugar, pharmaceutical, petrochemicals, electronics, automobiles, engineering services, food processing, etc. are practised here.

Question 2.
Which occupation is practised on a large scale?
Answer:
Sugar manufacturing is an occupation which is practised on a large scale.

Question 3.
Find the reason behind it.
Answer:
Advantageous location of Maharashtra, progressive government policies, availability of raw material, i.e. sugarcane, good infrastructure and above all the ownership given to farmers in sugar factories are the reasons why this occupation is practised on a large scale.

Question 4.
Both human and natural factors affect occupations. Can you find those factors?
Answer:
Development of industries, availability of technical know-how and skilled manpower, existing labour laws and government policies pertaining to occupations development of infrastructure are the human factors that affect occupations.
Climate, terrain of a region, fertility of soil, susceptibility to natural calamities, availability of raw materials, etc. are the natural factors which affect occupations.

Question 5.
Obtain information about the damage caused to the environment through different occupations.
Answer:
Pollution of the environment in all its form – air, water, soil and land, deforestation, soil erosion, depletion of the ozone layer, etc. are some of the damages caused due to different occupations practised.

While practising occupations we should be careful not be cause of hazardous air emissions, land contamination leading to soil pollution, marine and coastal pollution caused due to untreated waste water, etc. Sustainable development, let us remember should be the need of the hour.

Visit a secondary occupation in your area gather information related to that occupation using the following points and note it down:
Answer:

Name of the occupation	Pharmaceutical manufacturing.
Raw material used	Animal extracts, herbal extracts, additives like glaze, talc, etc. and chemical substances.
Sources of raw material	From different parts of India, some raw materials are imported from other countries.
Finished products	Medicine and other pharma products.
Market of finished products	National and international markets including US, UK, Australia, Russia, Germany, etc.
Tertiary occupations	Transport of goods, loading and unloading of goods and sale of goods.

Class 6 Geography Chapter 10 Human Occupations Additional Important Questions and Answers

Complete the following statements by choosing the correct options:

Question 1.
Occupations which are dependent on nature are called _______ occupations. (secondary, primary, tertiary)
Answer:
primary

Question 2.
Processed products are ________.(non-perishable, more durable, less durable)
Answer:
more durable

Question 3.
Occupations dependent on primary occupations are called ______ occupations. (primary, secondary, quaternary)
Answer:
secondary

Question 4.
The occupations which provide complimentary services to the other two occupations are called _________ occupations. (tertiary, secondary, primary)
Answer:
tertiary

Question 5.
Countries which have more manpower engaged in _______ activities are considered to be developed countries. (primary , secondary, tertiary)
Answer:
tertiary

Question 6.
Countries which have more manpower engaged in primary activities are considered to be _____ countries. (developed, developing, under developed)
Answer:
developing

Question 7.
transactions decide the country’s ______.(production, occupation, manpower)
Answer:
primary

Arrange the following in proper order:

• Selling milk products in the market.
• Obtaining milk and selling milk.
• Processing milk at milk processing centres.
• Rearing of domestic animals.
• Making ghee, butter, cheese, shrikhand, paneer, milk powder, etc.

Answer:

• Rearing of domestic animals.
• Obtaining milk and selling milk.
• Processing milk at milk processing centre.
• Making ghee, butter, cheese, shrikhand, paneer, milk powder, etc.
• Selling milk products in the market.

Match the pairs correctly:

Question 1.

Column A	Column B
(1) Animal husbandry and fishing	(a) secondary occupation
(2) Processing of milk	(b) tertiary occupation
(3) Transport of goods	(c) quaternary occupation
(4) Quality testing of product	(d) primary occupation
(5) Transaction of the country	(e) economic transactions
	(f) production

Answer:
1 – d
2 – a
3 – b
4 – c
5 – f

Name the following:

Question 1.
Any two products obtained after processing milk at milk processing centre:
Answer:

1. Butter
2. Cheese

Question 2.
Any two animals domesticated by man:
Answer:

1. Cow
2. Buffalo

Question 3.
Occupation which is directly dependent on nature:
Answer:
Primary occupations.

Question 4.
Occupations dependent on primary occupations:
Answer:
Secondary occupations.

Question 5.
Occupations which provide complementary services to primary and secondary occupations:
Answer:
Tertiary occupations.

Question 6.
Occupations like sale of goods
Answer:
Tertiary occupations or service occupations

Question 7.
Occupations which requires special expertise:
Answer:
Quaternary occupations.

Question 8.
Countries which have more manpower engaged in tertiary activities:
Answer:
Developed countries.

Question 9.
Countries which have more manpower engaged in primary activities:
Answer:
Developing countries.

Complete the table:

Occupations	Definition	Examples
Primary
Secondary
Tertiary
Quaternary

Answer:

Occupations	Definition	Examples
Primary	Occupation which directly depend on nature are called primary occupations.	Farming, animal husbandry, mining, foresting, fishing.
Secondary	Occupations dependent on primary occupations are called secondary occupations.	Food processing, manufacturing, construction.
Tertiary	Occupations which provide complementary services to primary and secondary occupations are called tertiary occupations.	Transport of goods, commercial services, loading and unloading goods, sale of goods.
Quaternary	The occupations which requires special expertise and special skills are called quaternary occupations.	Quality testing of food products, inspection and maintenance., IT.

Answer the following questions in one sentence each:

Question 1.
Why does man undertake various activities?
Answer:
Man undertakes various activities to satisfy his need.

Question 2.
How are activities undertaken by man classified?
Answer:
Activities undertaken by man are classified on the basis of their nature and the products they yield.

Question 3.
Where are raw materials supplied to the industries often obtained from?
Answer:
Raw materials supplied to the industries are often obtained from nature.

Question 4.
Which occupations require special skills and expertise?
Answer:
Quaternary occupations requires special skills and expertise.

Answer the following questions in short:

Question 1.
Why are the prices of processed milk products higher?
Answer:

• Milk obtained from nature is processed and made into different products which involves high cost.
• These products are more durable.
• Their quality too is enhanced.
• Therefore their price is also higher.

Question 2.
Explain the term “Service occupation”.
Answer:

• The occupations which provide complementary services to the other two occupations, i.e., primary and secondary occupations are tertiary occupations.
• These occupations are complementary i.e., supportive to all other occupations.
• These occupations are called as service occupation e.g., transport of goods, loading and unloading of goods and sale of goods, etc.

Question 3.
A person testing the quality of a product is practising a quaternary occupation. Elaborate.
Answer:

• To test the quality of a product, a person must have some special skills.
• This service is not an ordinary one but the one which requires special expertise.
• Such services which requires special skills and expertise are called quaternary occupations.

Question 4.
How can we decide the extent of the country’s development?
Answer:

• Different occupations are practised in different countries of the world.
• Through these occupations, economic transactions occur within a country and between various countries.
• These transactions decide the country’s production of various goods and their national income.
• This, in turn, is used to decide the extent of a country’s development.

Question 5.
What decides the country’s annual income?
Answer:
Different occupations are practised in different countries of the world through which economic transactions occur within country and various countries which decide the country’s production of various goods and their annual income.

I can do this!

Question 1.
Answer:

Name different occupations

Primary occupation Secondary occupation Tertiary occupation Quaternary occupation

Differences

Primary occupations are those occupations which are dependent on nature, e.g. Agriculture. Occupations dependent on primary occupations are called secondary occupations, e.g. Food processing. Those occupations which provide complementary services to primary and secondary occupation are called tertiary occupations, e.g. Sale of goods. While occupation which requires special skills and expertise are called quaternary occupation, e.g. Quality assurance.

Question 2.
Classify the occupations from primary to quaternary.
Answer:

Primary occupations	Secondary occupations	Tertiary occupations	Quaternary occupations
Farming, mining, forestry, animal husbandry, fishing	Manufacturing, construction, food processing	Commercial services, transport of goods, loading and unloading of goods, sale of goods	Research and development, IT, quality assurance, inspection and maintenance

 

Balbharti Maharashtra State Board Class 7 Science Solutions Chapter 5 Food Safety Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 7 Science Solutions Chapter 5 Food Safety

Class 7 Science Chapter 5 Food Safety Textbook Questions and Answers

1. Complete the following statements by using the correct option from those given below.
(Irradiation, dehydration, pasteurization, natural, chemical)

Question a.
Drying the food grains from farms under the hot sun is called …………. .
Answer:
dehydration

Question b.
Materials like milk are instantly cooled after heating up to a certain high temperature. This method of food preservation is called ……….. .
Answer:
pasteurization

Question c.
Salt is a ……….. type of food preservative.
Answer:
natural

Question d.
Vinegar is a …………. type of food preservative.
Answer:
chemical

2. Answer the following questions in your own words. 

Question a.
How is milk pasteurised?
Answer:
Boil the milk at 80°C for 15 minutes and cool it quickly. This destroys the microbes present in the milk and it can remain for a longer duration. This process is called pasteurization of milk.

Question b.
Why should we not consume adulterated food materials?
Answer:
Different types of adulterants affect our health in different ways. Some adulterants cause abdominal discomfort or poisoning while some may affect the functioning of some organs if consumed over a long period of time or even cause cancer.

Question c.
What precautions do your parents take to keep foodstuffs safe?
Answer:
Our parents take following care to keep foodstuffs safe

1. Drying of grains.
2. Boiling of milk, soups and curries from time to time.
3. Refrigeration of vegetables, fruits, milk and cooked food.
4. Candying of jams.
5. Use natural preservatives like oil, spices, neem leaves, salt, etc.
6. Use chemical preservatives in sauces, ketchups, pickles, jams and squashes.

Question d.
How does food spoilage occur? Which are the various factors spoiling the food?
Answer:
Food spoilage is the process in which food deteriorates to the point in which it is not edible to humans or its quality of edibility becomes reduced.
Following are the factors for spoiling of food:

1. Bacteria causes food to spoil
2. Incorrect storage may spoil the food.
3. Infestation by pests.
4. Chemical reaction takes place in food and it gets spoiled.

Question e.
Which methods of food preservation would you use?
Answer:
I use following methods to preserve the food:

1. Freezing
2. Boiling
3. Salting of pickles
4. drying of grains
5. candying of jams.

3. What shall we do?

Question a.
There are vendors selling uncovered sweet-meats in open places in the market.
Answer:
We should tell them to sell the covered sweets because uncovered sweets are harmful to eat because it contains dust, dirt and germs. And buyers also should not purchase these uncovered sweets.

Question b.
A ‘pani-puriwala’ is serving the panipuri with dirty hands.
Answer:
We should tell him to wear gloves before serving panipuri because dirty hands contain dirt and germs which are harmful to us.

Question c.
We have purchased a large quantity of fruits and vegetables.
Answer:
We should keep them in refrigerator because in refrigerator, due to low temperature, fruits and vegetables do not spoil and biological and chemical reactions in fruits and vegetables are slowed down at low temperature.

Question d.
We need to protect foodstuffs from pests like rats, cockroaches, wall-lizards etc.
Answer:

1. If we do not protect foodstuffs from pests like rats, cockroaches, wall-lizards etc. then the food get spoiled by them and germs carried by them enters into the food.
2. If we eat this food then we may get food poisoning and we fall sick so we need to protect foodstuffs from pests like rat, cockroaches, wall lizards etc.

4. Find the odd-man-out. 

Question a.
Salt, vinegar, citric acid, sodium benzoate.
Answer:
Salt

Question b.
Lakhi dal, brick dust, metanyl yellow, turmeric powder.
Answer:
Turmeric powder

Question c.
Banana, apple, guava, almond.
Answer:
Almond

Question d.
Storing, freezing, settling, drying
Answer:
Storing

5. Complete the chart below.

Question a.

Answer:

Foodstuff	Adulterant
1. Turmeric powder	Metanil yellow
2. Black pepper	Dried papaya seeds
3. Rava	Iron filings
4. Honey	Sugar, water and jaggery

6. Explain why this happens and suggest possible remedies.

Question a.
Qualitative wastage of food.
Answer:
Qualitative wastage of food happens due to wrong methods of protecting food, excessive use of food preservatives, over-cooking, washing the vegetables after cutting them, mis¬handling of fruits like grapes and mangoes, miscalculation of the time required to transport food from producers to consumers are some of the reasons of qualitative wastage of food.
Possible remedies:

1. Avoid overcooking of food.
2. Store grains and other perishable foodstuffs like vegetables, fruits, milk etc. using proper methods.
3. Wash fruits and vegetables before cutting it.

Question b.
The cooked rice is underdone.
Answer:
Sometimes in a hurry if we cook the rice it is underdone.
Possible remedies: Use proper pressure cooker to cook the rice.

Question c.
The wheat that was bought is a bit moist.
Answer:
Sometimes due to sudden rain, wheat gets a bit moist. Possible remedies: Do not store the moist wheat, it gets spoiled due to fungus so first sundry it and then store in a clean and dry container to avoid microbial growth.

Question d.
The taste of yoghurt is too sour/slightly bitter.
Answer:
The taste of yoghurt is too sour/slightly bitter means it is spoiled. This happens if it is not kept in the refrigerator.
Possible remedies:- Always keep the yoghurt in refrigerator to avoid biological and chemical reactions in food materials.

Question e.
Cut fruits turned black.
Answer:
Fruit contains an enzyme called polyphenol oxidase or tyrosinase that reacts with oxygen. The oxidation reaction basically forms a sort of rust on the surface of fruits so it turns black.
Possible remedies:

1. Coat the fruits with sugar syrup
2. Add lemon juice on fruits.

7. Give reasons.

Question 1.
Food remains safe at 5° Celsius.
Answer:
Food remains safe at 5° Celsius because at 5°C, micro-organisms stop growing.

Question 2.
Nowadays, food is served in buffet style during large gatherings.
Answer:
Nowadays, food is served buffet style during large gatherings because due to buffet style quantitative wastage of food can be avoided, as people take only as much as they could eat.

Project:

Question 1.
Go to your kitchen und take notes about the food safety measures and the food wastage you see there.

Question 2.
In a science exhibition demonstrate the various methods of detecting food adulteration.

Class 7 Science Chapter 5 Food Safety Important Questions and Answers

Complete the following statements by using the correct option from those given below.
(Irradiation, dehydration, pasteurization, natural, chemical)

Question 1.
………………………. is celebrated as “World Food Day”.
Answer:
16th October

Question 2.
FSSAI means ………………………. .
Answer:
Food Safety and Standardization Authority of India

Question 3.
………………………. gas is filled in tight packets of potato wafers.
Answer:
Nitrogen

Question 4.
Common name of acetic acid is ……………………….
Answer:
Vinegar

Question 5.
………………………. is sprayed on the gunny bags containing food grains.
Answer:
Melathion

Question 6.
………………………. is used in smoking method.
Answer:
Aluminium phosphide

Question 7.
………………………. and ………………………. are emitted by radioactive isotopes in irradiation method.
Answer:
X – rays, gamma rays

Question 8.
In Maharashtra, irradiation plants have been installed at ………………………. for onions and potatoes and at for spices and condiments.
Answer:
Lasalgaon, Navi Mumbai

Question 9.
………………………. found the pasteurisation method.
Answer:
Louis Pasteur

Question 10.
………………………. adulterant is added to turmeric powder.
Answer:
Metanyl yellow

Question 11.
………………………. adulterant is added to red chilly powder.
Answer:
Brickdust

Question 12.
………………………. is used to make fruits more attractive.
Answer:
calcium carbide

Question 13.
………………………. and ………………………. harmful chemicals are mixed with cold drinks.
Answer:
carbonated soda, phosphoric acid

Question 14.
Shopkeepers change the of the ………………………. food packets fo avoid a financial loss.
Answer:
expiry date

Question 15.
Milk vendors add ………………………. to the milk to appear as higher fat content.
Answer:
urea

Question 16.
The shelf life of potatoes and onions ………………………. due to slowed-down of sprouting.
Answer:
increases

Question 17.
Serving too much food to guests at traditional feasts and banquets leads to ………………………. wastage of food.
Answer:
Quantitative

Question 18.
Miscalculation of the time required to transport food from producers to consumers leads to ……………………… . wastage of food.
Answer:
Qualitative

Question 19.
Prevention of food spoilage by microbial growth and infestation by pests is called ………………………. .
Answer:
food protection

Question 20.
………………………. is an example of a chemical preservative.
Answer:
Sodium benzoate.

Say whether True or False,, Correct and rewrite the false statement.

Question 1.
To prevent adulteration of food, it is inspected by the “Food and Drug Administration department of the government”.
Answer:
True

Question 2.
Overcooking of food increases the quality of food.
Answer:
False. Over cooking of food spoils it

Question 3.
Peanuts become rancid then, it is not good to eat.
Answer:
True

Question 4.
Oil and ghee contain fats.
Answer:
True

Question 5.
Prevention of food spoilage by microbial growth and infestation by pests is called food wastage.
Answer:
False. Prevention of food spoilage by microbial growth and infestation by pests is called food protection.

Question 6.
Serve yourself only as much as you can eat.
Answer:
True

Question 7.
Salt, sugar and oil are naturally available preservatives.
Answer:
True

Question 8.
Pickles can be preserved by salting.
Answer:
True

Question 9.
Milk vendors add urea to the milk so that it appears to have higher fat content.
Answer:
True

Question 10.
Shelf life of fruits and vegetables decreases by gamma rays emitted by radio-active isotopes.
Answer:
False. Shelf life of fruits and ‘ vegetables increases by gamma rays emitted by radioactive isotopes.

Give scientific reasons.

Question 1.
Refrigerators are used in the kitchen.
Answer:

1. Biological and chemical reactions in food materials are slowed down at low temperature.
2. As a result food remains in good condition for a longer period. Therefore refrigerators are used in the kitchen.

Question 2.
Potatoes and onions are treated with gamma rays.
Answer:
Potatoes and onions are treated with gamma rays because irradiation with gamma rays prevents their wastage due to sprouting and increases their shelf life.

Question 3.
Grains are sun-dried.
Answer:
Grains are sun-dried to preserve them because on sun drying their water content gets reduced and hence they last longer.

Question 4.
We boil milk from time to time.
Answer:
We boil milk from time to time to kill microorganisms in it and thus prevent it from getting spoilt.

Question 5.
Jams or pickles get spoilt if their jars are not sealed properly.
Answer:
If the jar is not sealed properly, micro¬organisms from the air enter in the jar and start growing on the food. Oxygen in the air helps the micro-organisms and fungi to grow faster and hence bring about the spoilage of the jams and pickles.

Question 6.
Some vendors add urea to the milk.
Answer:
Some vendors add urea to the milk so that it appears to have higher fat content.

Question 7.
Food wastage should be avoided.
Answer:
In countries like India, the food requirement is plenty and people do not get proper meals even once in a day. If food is not wasted then it could have met the need of many others. Therefore, food should not be wasted and proper measures should be implemented to stop quantitative and qualitative wastage of food.

Question 8.
Adulterated food should not be consumed.’
Answer:

1. The health of all people is endangered by food adulteration.
2. Different types of adulterants affect our health in different ways.
3. Some adulterants cause abdominal discomfort or poisoning, while some may affect the functioning of some organs if consumed over a long period of time or even cause cancer.

Can you tell?

Answer the following questions:

Question 1.
How and where food is wasted?
Answer:
Quantitative wastage of food:
1. Wrong methods of farming like hand sowing of, ts seeds, inadequate threshing, improper storage and wrong methods of distribution are some reasons for quantitative wastage of food.

2. Besides, much food is wasted as a result of the custom of offering and serving too much food to guests at traditional feasts or banquets.

3. Had it not been wasted, all this food could have met the need of many others Qualitative wastage of food: Using wrong methods of protecting food, excessive use of food preservatives, over-cooking, washing the vegetables after cutting them, mis-handling of fruits like grapes and mangoes, mis-calculation of the time required to transport food from producers to consumers, are some of the causes of quantitative wastage of food.

Question 2.
How is the food adulterated?
Answer:
Food is adulterated by the following ways:

1. Removal of some important components of food. e.g. removal of fat content of milk, essence of cloves, cardamoms, etc.
2. Mixing of a low quality inedible or cheaper material or harmful colour with food.
3. Mixing of some harmful materials like small stones, fine sand, iron filings, urea, dung of horse, sawdust etc.

How will you find out if food has been adulterated?

Balbharti Maharashtra State Board Class 6 Geography Solutions Chapter 5 Temperature Notes, Textbook Exercise Important Questions and Answers.

Maharashtra Board Class 6 Geography Solutions Chapter 5 Temperature

Class 6 Geography Chapter 5 Temperature Textbook Questions and Answers

A. Where am I?

Question 1.
The isotherm 0°C runs in my surroundings:
Answer:
Northern Asia/Northem Canada.

Question 2.
The mean annual temperature is 25°C around me:
Answer:
Central Africa.

Question 3.
The mean annual temperature around me is 10°C:
Answer:
Northern Europe/Central Asia/USA.

B. Who am I?

Question 1.
I connect places of equal temperature.
Answer:
Isotherm.

Question 2.
I am useful for measuring the correct temperature.
Answer:
Simple thermometer.

Question 3.
I get heated due to the land or water near me.
Answer:
Air.

Question 4.
Land and water gets heated due to me.
Answer:
Sunrays.

C. Answer the following:

Question 1.
Explain with a diagram, the effect of the spherical shape of the earth on the temperature at different latitudes.
Answer:

• Due to the spherical shape of the earth and the resultant curvature of the surface, sunrays occupy a larger or a lesser area.
• Equatorial regions which receive straight rays of the sun occupy less space and heat received is more.
• Polar regions receive slant rays of the sun occupy larger space but the heat received is less.

Question 2.
What is the relation between the latitudinal extent and temperature of a region?
Answer:

• 0° and 23° 30′ North and South perpendicular rays. Temperatures are higher throughout the year.
• 23° 30′ and 66° 30′ North and South receive extreme slant rays. Temperatures are moderate.
• 66° 30′ and 90° North and South receive extreme slant rays. Temperatures are very low.

Question 3.
What makes the isotherms run zigzag over continental areas?
Answer:
Isotherms run zigzag over continental areas because the temperature is influenced by its physical set up and height above the mean sea level on the continent.

Activity:

• Use the thermometer in your school and note the daily temperature on a display board.
• For two weeks, take down in your notebook, the information regarding weather given in the daily newspapers. Discuss your notes in the classroom.

Class 6 Geography Chapter 5 Temperature InText Questions and Answers

Can you tell?

Question 1.
Find the range of temperature at Mumbai, Nagpur and Srinagar. Draw bar graphs for the same.
Answer:
Annual Range of temperature in °C

Region	Min. temperature	Max. temperature
Mumbai	20.5	32
Nagpur	22	44
Srinagar	2.5	24

Answer the following questions with the help of figure:

Question 1.
What is the tube of the thermometer fixed on ?
Answer:
The tube of the thermometer is fixed on a mount.

Question 2.
What substance is used in the thermometer tube?
Answer:
Mercury or alcohol is used in the thermometer tube.

Question 3.
What do the figures on the scale indicate?
Answer:
The figures on the scale indicate temperature scale.

Question 4.
In which different units is the temperature measured?
Answer:
The temperature shows Celsius and Fahrenheit.

Question 5.
What season does the temperature in the figure indicate?
Answer:
The figure indicates summer season.

How will the rays fall between:

Question 1.
0° and 23° 30′ North and South?
Answer:
Perpendicular rays.

Question 2.
23° 30′ and 66° 30′ North and South?
Answer:
Slant rays.

Question 3.
66° 30′ and 90° North and South?
Answer:
Extreme slant rays.

What will you do?

You stay at ‘Man’ in Satara district. Your Grandma stays at Vengurla in Sindhudurg district. During Diwali, you often visit Vengurla. You like the sea coast there. The warm air of that region attracts you because you are freed from the dry air and scratching cold of your place. This time Grandma is suffering from asthma. Doctors have advised her to stay at a place which has a drier climate. What should you do?
Answer:

• Humid air is heavier than dry air, thus a person suffering from asthma finds it difficult to breathe in humid air.
• So, I will take my grandma to my place at Man’ in Satara district, as the air is dry in this region.

Think a little!

Question 1.
Will it be alright if water or oil is used in the thermometer?
Answer:
Water or oil cannot be used in a thermometer because they have a very high freezing part due to the lower temperature upto 30°C cannot be shown.

Question 2.
Where is the temperature of your district headquarters recorded?
Answer:
The temperature of the district headquarters is recorded in the district meteorological department.

Use your brain power!

Question 1.
Which season would be the best for visiting the following places and why? Goa, Chikhaldara, Chennai, Darjeeling, Ellora, Agra.
Answer:
Goa, Chennai, Ellora and Agra in the winter season. Chikhaldara and Darjeeling in the summer season.

Question 2.
Tell if the following statement is right or wrong. Give reasons.
In order to understand the climate of a region, the latitudinal extent is more useful than the longitudinal extent.
Answer:
The above statement is right.
In order to understand the climate of a region, the latitudinal extent is more useful because the earth is divided into three temperature zones depending on the amount of heat received from the equator to the North and South Poles.

Observe the map. Name the coastal areas that will experience changes in temperature. Give the reason for this.

Answer:
(i) West coast of North America : The California current moving from the Northern frigid zone to the torrid zone will reduce the temperature at this coast.

(ii) East coast of North America : The Gulf stream current flowing towards the northern frigid zone will increase the temperature at this coast.

(iii) West coast of Europe : The North Atlantic current flowing towards the Northern frigid zone will increase the temperature at this coast

Class 6 Geography Chapter 5 Temperature Additional Important Questions and Answers

Fill in the blanks wish the right alternative given in the bracket:

Question 1.
The main factor which influences the distribution of temperature is ______. (ocean current, longitude, latitude)
Answer:
latitude

Question 2.
______gas can hold heat within itself in the atmosphere. (Carbon dioxide, Oxygen, Hydrogen)
Answer:
Carbon dioxide

Question 3.
Isotherms are fairly parallel to the latitudinal line in the _____ hemisphere. (Northern, Western, Southern)
Answer:
Southern

Question 4.
Nagpur receives _______ climate. (extreme, equable, moderate)
Answer:
extreme

Question 5.
When an ocean current flows from the frigid to the torrid zone, it _____ the temperature of the coast in the torrid zone. (increase, reduces, equal)
Answer:
reduces

Question 6.
Isotherms are lines that connect places with the ______ temperature after avoiding the effect of the height, (different, same, moderate)
Answer:
same

Question 7.
Substance used in a thermometer tube is _____ (water, mercury, oil)
Answer:
mercury

Question 8.
The freezing point of mercury is _______°C. (-39, -49, -59)
Answer:
-39

Question 9.
The freezing point of alcohol is _____ °C. (-110, -120, -130)
Answer:
-130

Question 10.
Air temperature is measured in _______ (Celsius, Fahrenheit, Grams)
Answer:
Celsius

Match the pairs correctly:

Question 1.

Factor	Isoline
(1) Height	(a) Isotherm
(2) Temperature	(b) Isohyet
(3) Pressure	(c) Contour
(4) Rainfall	(d) Isobar
(5) Planktons	(e) Food for fishes
	(f) Ocean current

Answer:
1 – c
2 – a
3 – d
4 – b
5 – e

Give one word for the following sentences:

Question 1.
The sunrays which occupy less area.
Answer:
Perpendicular.

Question 2.
The sunrays which occupy larger area.
Answer:
Slant.

Question 3.
The climate in coastal areas.
Answer:
Equable.

Question 4.
The climate in continental areas.
Answer:
Extreme.

Question 5.
Food for fishes.
Answer:
Plankton.

Question 6.
Main factor responsible for influenceing the distribution of temperature.
Answer:
Latitude.

Question 7.
Measuring daily temperature.
Answer:
Thermometer.

Name the following:

Question 1.
Temperature zones on the earth:
Answer:
Torrid zone, temperate zone and frigid zone.

Question 2.
Lines drawn on a map by joining all the points having the same value:
Answer:
Isolines.

Question 3.
Two cold currents:
Answer:
Canaries and Peruvian current.

Question 4.
Two warm currents.:
Answer:
Equatorial and Brazil current.

Answer the following questions in one sentence each:

Question 1.
What is diurnal range of temperature?
Answer:
The difference in maximum and minimum temperature of a day is called diurnal range of temperature.

Question 2.
What factors leads to horizontal currents in the ocean?
Answer:
Horizontal currents develop in the ocean due

difference in temperature
density of water and
winds.

Question 3.
What is the advantage of the convergence of warm and cold current?
Answer:
The convergence of warm and cold current favours the growth of plankton.

Question 4.
What are isolines?
Answer:
Lines drawn on a map by joining all the points having the same value are called isolines.

Question 5.
Where is the distance between the isotherms parallel?
Answer:
The distance between the isotherms are parallel from South Pole to the Tropic of Capricorn.

Question 6.
Which factors lead to diversity in the climate of different regions?
Answer:
The factors which lead to diversity in the climate of different regions are nearness to the sea, continentality, height above the mean sea level and physical level.

Question 7.
What is an annual range of temperature?
Answer:
The difference in the mean temperatures of summer and winter is called an annual range of temperature.

Give geographical reasons for the following statements:

Question 1.
There is unequal distribution of heat received from the Sun.
Answer:
The unequal distribution of heat received from the Sun is because:

• The earth is spherical in shape.
• The rays which fall on the equator are straight, occupy less area and give more heat.
• The rays which fall on the curvature i.e., on the polar regions are slant rays which occupy large area and give less heat.

Question 2.
The temperature near the sea level is higher and it decreases in the mountainous region.
Answer:

• Firstly, the sea water gets heated by the rays of the sun.
• The absorbed heat is later radiated into the atmosphere.
• So, the layer of air close to the surface gets heated.
• This heat gets transferred vertically to the adjacent upper layers of air.
• Therefore, the temperature near the sea level is higher and it decreases at the mountainous region.

Question 3.
In the coastal areas, as compared to continental areas, the temperature of air is lower during the day but warmer at night.
Answer:

• There is difference in the heating and cooling of land and water.
• The air over the land gets heated faster and also cools rapidly.
• The air over the water gets heated slowly and also loses the heat in a slower manner.
• The temperature of air is lower during the day but warmer at night, in the coastal areas when compared to continental areas.

Question 4.
Greenhouse gases lead to increasing temperature of the earth.
Answer:

• Some gases in the atmosphere like carbon dioxide and water vapour can hold the heat within themselves for a long period of time.
• Due to the gases, the temperature of air in the atmosphere increases.
• Thus, greenhouse gases lead to increasing temperature of the earth.

Question 5.
Regions, where warm and cold currents converge, are favourable for the growth of fisheries.
Answer:

• Regions, where warm and cold currents converge, are favourable for the growth of planktons.
• Planktons are the food for fishes.
• Fishes travel here in large numbers.
• They breed in warm waters and increase the number of fishes.
• Therefore, regions where warm and cold currents converge favour the growth of fisheries.

Answer the following questions in short:

Question 1.
Explain the movement of ocean currents from equator to the polar region.
Answer:
Due to temperature differences, both upward and horizontal currents develop in the ocean. Besides temperature differences, factors like winds and differences in the density of water also give rise to horizontal currents. These ocean currents flow from the equator to the polar region and from the polar region to the equator.

Question 2.
Explain the effect of the ocean current flows from the frigid to the torrid zone.
Answer:
When an ocean current flows from the frigid to the torrid zone, it reduces the temperature of the coasts in the torrid zone. When a current flows from the torrid to the frigid zone, it increases the temperature of the coasts in the frigid zone.

I can do this!

Question 1.
Identify the temperature zones.
Answer:
There are three temperature zones namely torrid, temperate and frigid zones.

Question 2.
Tell the factors influencing temperature.
Answer:
Factors influencing temperature are latitude, winds, nearness to the sea, continentality, vegetation cover, cloud cover, physical set up, height above sea level and industrialisation.

Question 3.
Describe the global distribution of temperature with its characteristics.
Answer:
The isotherms in the southern hemisphere are fairly parallel to the latitudinal lines. From South Pole to the Tropic of Capricorn the distance between these lines is almost equal. As the proportion of land in the southern hemisphere is limited, temperatures in these parts are largely influenced by latitude.

In the northern hemisphere, the distance between these lines varies. In this hemisphere, the proportion of land is comparatively greater. This affects the distribution of temperature. These effects are seen in the form of variations in the distance between the isotherms and curved nature of these lines.

Question 4.
Describe the structure of a thermometer.
Answer:
A vacuum glass tube is filled with mercury or alcohol is mounted on a wooden board. There are two temperature scales showing Celsius and Fahrenheit.

Balbharti Maharashtra State Board Class 7 Civics Solutions Chapter 1 Introduction to Our Constitution Notes, Textbook Exercise Important Questions and Answers.

Maharashtra Board Class 7 Civics Solutions Chapter 1 Introduction to Our Constitution

Class 7 Civics Chapter 1 Introduction to Our Constitution Textbook Questions and Answers

1. Explain the following concepts:

Question 1.
Provisions in the Constitution
Answer:
It is the basic or fundamental law that is stated directly in the Constitution. Therefore, the rules and provisions in the Constitution are the basic or fundamental law of the land. The government is bound to carry out the administration of the country as per the provisions of the Constitution.

Question 2.
Constitution Day
Answer:
The Constituent Assembly enacted the Constitution and adopted it on 26th November, 1949. Therefore, 26th November is observed as ‘Constitution Day’ in India.

2. Discuss:

Question 1.
A Constituent Assembly was established.
Answer:
(i) The process of the making of the Indian Constitution started in 1946.

(ii) The leaders of the freedom movement insisted that independent India will be governed not by the laws made by the British, but by laws made by Indians themselves.

(iii) A Committee was established to prepare the Constitution of Independent India and it came to be known as Constituent Assembly.

Question 2.
Dr. Babasaheb Ambedkar is called the ‘Architect of the Indian Constitution’.
Answer:
(i) The draft of the Constitution was prepared by Dr. Babasaheb Ambedkar and presented to the Constituent Assembly after an in-depth contemplation and study of the Constitution of different countries of the world.

(ii) It was discussed Article by Article. Many amendments were suggested by different members.

(iii) Dr. Babasaheb Ambedkar would present the draft, answer the various questions raised on them and make changes in the draft as per the suggestions of the Constituent Assembly in order to make every provision of the Constitution flawless.

(iv) Due to his contribution towards the making of the Constitution, Dr. Babasaheb Ambedkar is called the ‘Architect of the Indian Constitution’.

Question 3.
What is included in the administration of a country?
Answer:
(i) The Government has to make laws relating to several subjects such as defending the boundaries, protecting the people from external aggression, eradication of poverty, creating employment, education and health services, encouragement to commerce and industries, protection of the weaker sections, making policies for the progress of women, children and the tribal people, etc.

(ii) In short, governments in modem times have to take decisions related to different issues right from space research to public cleanliness. This is included in the administration of a country

3. Choose the right option:

Question 1.
The Constitution of this country is primarily unwritten
(a) America
(b) India
(c) England
(d) None of these
Answer:
England

Question 2.
Who was the President of the Constituent Assembly
(a) Dr. Babasaheb Ambedkar
(b) Dr. Rajendra Prasad
(c) Durgabai Deshmukh
(d) B.B. Rai
Answer:
Dr. Rajendra Prasad

Question 3.
Who among these was not a member of the Constituent Assembly?
(a) Mahatma Gandhi
(b) Moulana Azad I
(c) RajkumariAmritKaur
(d) Hansaben Mehta I
Answer:
Mahatma Gandhi

Question 4.
Who was the Chairman of the Drafting Committee
(a) Dr. Rajendra Prasad
(b) Sardar Vallabhbhai Patel
(c) Dr. Babasaheb Ambedkar
(d) J.B. Kripalani
Answer:
Dr. Babasaheb Ambedkar

4. Answer the following questions:

Question 1.
On what subjects does the Government have to make laws?
Answer:
Government has to make laws relating to several subjects:

• Defending the boundaries.
• Protecting the people from external aggression.
• Eradication of poverty.
• Creating employment, education and health services, encouragement to commerce and industries.
• Protection of the weaker section, making policies for the progress of women, children and the tribal people.

Question 2.
Why do we celebrate 26th January as Republic Day?
Answer:

• Our country began to be governed according to the provisions of the Constitution from 26th January, 1950.
• The Indian Republic came into existence from this day.
• Therefore, 26th January is celebrated as Republic Day.

Question 3.
What are the advantages of running the government as per the provisions of the Constitution?
Answer:
There are several advantages of governing a country with the help of rules or provisions included in a Constitution:

(i) The Government has to function within a set of rules. This reduces the possibility of the misuse of the power and authority they have been given.

(ii) A Constitution includes the rights and freedom of the citizens. The Government cannot take away these rights. Therefore, people’s rights and freedoms are safeguarded.

(iii) Running a country as per the provisions of the Constitution is the same as establishing the rule of law, so there is no scope for the misuse of power or high-handed administration.

(iv) If a country is run as per the Constitution, the faith that the common people have in the government increases. They then become more keen on participating in the activities of the government. Democracy is strengthened due to the increased participation of the people.

(v) The Constitution presents some political ideals before the country. The nation is also bound to act in that direction. It creates an atmosphere conducive to attain world peace and security, and preservation of human rights.

(vi) Since the Constitution also includes the list of citizens’ duties, it fixes the responsibility of the citizens as well.

Activities

1. Several committees were established for the effective functioning of the Constituent Assembly. Find out more information about them and discuss the role of different committees.
2. Prepare a report on how you celebrated Constitution Day in your school.
3. Make a collection of the photos of the members of the Constituent Assembly.

Class 7 Civics Chapter 1 Introduction to Our Constitution InText Questions and Answers

In-text questions.

Question 1.
Do you wish to ask the questions that puzzled Sameer and Vandana?
Answer:
Yes, I wish to ask such questions.

Question 2.
Where can we find all the rules according to which the administration of the country is carried out?
Answer:
The rules according to which the administration of the country is carried out are found mentioned in a country’s constitution.

Question 3.
Who makes those rules?
Answer:
These rules are made by the Constituent Assembly which consist of the representatives of the states and provinces and the leaders of that country.

Question 4.
Is it binding on us to follow them?
Answer:
Yes. All the rules mentioned in the Constitution are binding on every citizen of the country.

Let’s find out:

Find out some information about the Constitution of any one country of your choice with the help of the following points.

Question 1.
Name of the country
Answer:
India

Question 2.
Year of the making of the Constitution:
Answer:
The Constituent Assembly enacted the Constitution and adopted it on 26th November 1949. However the country began to be actually governed according to the provisions of the Constitution only from 26th January 1950.

Question 3.
Two features of the Constitution:
Answer:
(a) The lengthiest Constitution in the world: The Indian Constitution is the lengthiest and the most detailed of all the written Constitutions of the world containing 449 articles in 25 parts, 12 schedules, 5 appendices and 101 Amendments.

(b) Parliamentary form of Government: The constitution of India establishes a parliamentary form of a government both at the Centre and the State. The essence of the parliamentary government is its responsibility to the Legislature. The President is the constitutional head of the State but the real executive power is vested in the council of ministers whose head is the Prime Minister.

Activity:

Question 1.
Several committees were established for the effective functioning of the constituent Assembly. Find out more information about them and discuss the role of different committees.
Answer:

1. Committee on the Rules of Procedure: Rajendra Prasad
2. Steering Committee : Rajendra Prasad
3. Finance and Staff Committee: Rajendra Prasad
4. Credential Committee: Alladi Krishnaswami Ayyar
5. House Committee: B. Pratibha Sitaramayya
6. Order of Business Committee: K.M. Munsi
7. Adhoc Committee on the National Flag: Rajendra Prasad
8. Committee on the Functions of the Constituent Assembly: G.V. Mavalankar
9. States Committee: Jawaharlal Nehru
10. Advisory Committee on Fundamental Rights, Minorities and Tribal and Excluded Areas:Vallabhbhai Patel
11. Minorities Sub-Committee: H. C. Mookherjee
12. Fundamental Rights Sub-Committee: J. B. Kripalani
13. North-East Frontier Tribal Areas and Assam Excluded & Partially Excluded Areas Sub¬Committee: Gopinath Bardoloi
14. Excluded and Partially Excluded Areas (Other than those in Assam) Sub-Committee: A.V. Thakkar
15. Union Powers Committee: Jawaharlal Nehru
16. Union Constitution Committee: Jawaharlal Nehru
17. Drafting Committee: B.R. Ambedkar

Class 7 Civics Chapter 1 Introduction to Our Constitution Additional Important Questions and Answers

Complete the sentence by choosing the appropriate words from the options given below:

Question 1.
The administration of our village or city is carried out in accordance with _______. (will of the majority, rules, orders of the Collector)
Answer:
rules

Question 2.
The book in which all the provisions regarding the administration of the country are mentioned together in a systematic way is called a ______ . (Law book, Guide, Constitution)
Answer:
Constitution

Question 3.
Democracy is _____ due to increased participation of the people. (strengthened, maintained, weakened)
Answer:
strengthened

Question 4.
The process of the making of the Indian Constitution started in the year _____. (1952,1947,1946)
Answer:
1946

Question 5.
A committee which was established to prepare the Constitution of independent India was the _______ (Drafting Committee, StandingCommittee, Constituent Assembly)
Answer:
Constituent Assembly

Question 6.
There were a total of ______ members in the Constituent Assembly. (298, 299, 289)
Answer:
299

Question 7.
_____ was the Chairman of the Drafting Committee. (Durgabai Deshmukh, J.B. Kripalani, Dr. Babasaheb Ambedkar)
Answer:
Dr. Babasaheb Ambedkar

Question 8.
Dr Babasaheb Ambedkar is called the ______ of the Indian Constitution’. (Architect, Visionary, Inspiration)
Answer:
Architect

Question 11
_____is observed as ‘Constitution Day’. (26th November, 26th January, 15th August)
Answer:
26th November

Question 10.
26th January is celebrated as ______ Day. (Independence, Republic, Constitution)
Answer:
Republic

Question 11.
Our Constitution is a/an _________ document of the provision related to the administration of the country. (written, oral, inspirational)
Answer:
written

Match the following:

Question 1.

(1) 15th August	(a) Constitution Day
(2) 26th November	(b) Republic Day
(3) 26th January	(c) Independence Day
(4) 26th January 1950	(d) Country began to be governed according to the provisions of the Constitution

Answer:
1 – c
2 – a
3 – b
4 – d

Answer in one or two sentences:

Question 1.
Why do we follow norms and rules?
Answer:
We follow norms and rules in order that the activities in the family, our school, our village or city are carried out smoothly.

Question 2.
How is the administration of our country carried out?
Answer:
The administration of our country is carried out through a system of rules.

Question 3.
Explain the term ‘Constitution’.
Answer:
The book in which all the provisions related to the administration of the country are mentioned together in a systemic way is called Constitution.

Question 4.
What are the basic or fundamental law of the land?
Answer:
The rules and provisions in the Constitution are the basic or fundamental law of the land.

Question 5.
How were decisions made in the Constituent Assembly?
Answer:
Decisions in the Constituent Assembly were made on the basis of debate and discussion.

Question 6.
What is governance?
Answer:
Government in modem times have to take decisions related to different issues right from space research to public cleanliness. This is governance.

Name the following:

Question 1.
Name the well-known members of the constituent assembly.
Answer:
Dr. Rajendra Prasad, Pandit Jawaharlal Nehru, Dr. Babasaheb Ambedkar, Sardar Vallabhbhai Patel, Maulana Abdul Kalam Azad, Sarojini Naidu, J. B. Kriplani, Rajkumari Amrit Kaur, Durgabai Deshmukh, Hansaben Mehta and others.

Question 2.
The President of the Constituent Assembly.
Answer:
Dr. Rajendra Prasad.

Question 3.
The States in pre-independence period where the local princes carried out the administration.
Answer:
Princely states.

Give reasons:

Question 1.
We celebrate 26th January as Republic Day.
Answer:
(i) Our country began to be governed according to the provisions of the Constitution from 26th January, 1950.

(ii) The Indian Republic came into existence from this day. Therefore, 26th January is celebrated as Republic Day.

Question 2.
Nature of the Constitutions of different countries is different.
Answer:

• There are differences of history, social structures, culture, traditions, etc., between the countries.
• Similarly, their needs and objectives also might be different.
• Each country tries to create a Constitution that is not only suited to its needs and objectives, but also is in tune with its distinct nature.

Explain in detail:

Question 1.
If the government does not follow the Constitution while making laws, the Judiciary can declare those laws null and void or unconstitutional. Explain.
Answer:

• The Government is established by the representatives elected by the people.
• It is bound to carry out the administration of the country as per the provisions of the Constitution.
• The rules and provisions in the Constitution are the basic or fundamental law of the land.
• While making laws, the government is bound to follow the Constitution.
• If it does not do so, then the Judiciary can declare those laws null and void or unconstitutional.

Question 2.
How long did it take to write the Constitution?
OR
Why is it the lengthiest Constitution in the world?
Answer:
(i) It took 2 years, 11 months and 17 days to ! complete the writing of the Constitution.

(ii) There were 22 parts, 395 Articles and 8 Schedules in the original Constitution, thus making it the lengthiest Constitution in the world.

Question 3.
Write about the wide range of issues in the Constitution which were contributed by Dr. Babasaheb Ambedkar.
Answer:
Dr. Babasaheb Ambedkar’s contribution was in a wide range of issues like water conservation, foreign policy, national security, journalism, economics, social justice, etc.

Question 4.
We are proud of our Constitution.
Answer:
(i) Decisions in the Constituent Assembly were made on the basis of debate and discussion. A respect for opposing view points and the acceptance of the appropriate suggestions were a characteristic of the working of the Constituent Assembly.

(ii) It took 2 years, 11 months and 17 days to complete the writing of the Constitution.

(iii) There were 22 parts, 395 Articles and 8 schedules in the original Constitution

Balbharti Maharashtra State Board Class 8 Science Solutions Chapter 12 Introduction to Acid and Base Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 8 Science Solutions Chapter 12 Introduction to Acid and Base

Class 8 Science Chapter 12 Introduction to Acid and Base Textbook Questions and Answers

1. Identify the following solutions, whether they are acid or base.

Question a.

Answer:

2. Write chemical names from given formulae.
H₂SO₄, Ca(OH)₂, HCl, NaOH, KOH, NH₄OH

Question a.
Write the chemical names from given formulae: H₂SO₄, Ca(OH)₂, HCl, NaOH, KOH, NH₄OH
Answer:

1. H₂SO₄ – Sulphuric acid
2. Ca(OH)₂ – Calcium hydroxide
3. HCl – Hydrochloric acid
4. NaOH – Sodium hydroxide
5. KOH – Potassium hydroxide
6. NH₄OH – Ammonium hydroxide

3. Sulphuric acid has highest importance in chemical Industry. Why?

Question a.
Sulphuric acid has highest importance in chemical Industry. Why?
Answer:
Answer:
Sulphuric acid has highest importance in the chemical industry because it is used in the manufacturing of fertilizers like ammonium sulphate and superphosphate of lime. It is used in the manufacturing of hydrochloric acid, nitric acid, phosphoric acid, ether, plastics and metal sulphates. It is also used in the manufacturing of dyes, drugs, perfumes, disinfectants and glue.

4. Give answers.

Question a.
Which acid is used for getting chloride salt?
Answer:
Hydrochloric acid is used for getting chloride salt.

Question b.
By squeezzing lemon on a piece of rock the gas liberated turned lime water milky. Which compound is present in the rock?
Answer:
Metal carbonate is present in the rock.

Question c.
The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not?
Answer:
The chemical is tested with blue litmus paper. If it turns red it is an acidic otherwise tested with red litmus paper, if it turns blue, it is an alkaline.

5. Answer the following questions. 

Question a.
Explain the difference between acid and base.
Answer:
Acids:

1. Acids have sour taste.
2. Acids turn blue litmus red.

Bases:

1. Bases have bitter taste.
2. Bases turn red litmus blue.

Question b.
Why indicator does not affect by salt?
Answer:
Mostly indicators are organic compounds which do not react with a salt.

Question c.
Which substances are produced i by neutralization process?
Answer:
Salt and water are produced in the f neutralization process.

Question d.
Which are the industrial uses of acids?
Answer:
Acids which are used in the industry are:

1. Sulphuric acid
2. Hydrochloric acid
3. Nitric acid.;

1. Sulphuric acid: Sulphuric acid is 5 used (a) in the manufacture of chemical? fertilizers like ammonium sulphate, (b) for cleaning gold and silver articles and (c) in car batteries.

2. Hydrochloric acid: Hydrochloric acid is used (a) to clean toilets and (b) to obtain glucose from starch and also for producing gelatine.

3. Nitric acid: Nitric acid is used (a) in the manufacture of perfumes (b) for engraving on copper, brass or silver and (c) in the manufacture of paints and explosives.

6. Select proper word given in bracket and fill in the blanks.

Question a.
Main constituent of acid is ……………. .
Answer:
Main constituent of acid is H⁺ ion.

Question b.
Main constituent of alkali is …………….. .
Answer:
Main constituent of alkali is OH^– ion.

Question c.
Tartaric acid is a …………… acid.
Answer:
Tartaric acid is a weak acid.

7. Match the pairs. 

Question a.

Group A	Group B
1. Tamarind	a. Acetic acid
2. Curd	b. Citric acid
3. Lemon	c. Tartaric acid
4. Vinegar	d. Lactic acid

Answer:

Group A	Group B
1. Tamarind	c. Tartaric acid
2. Curd	d. Lactic acid
3. Lemon	b. Citric acid
4. Vinegar	a. Acetic acid

8. State true or false.

Question a.
Oxides of metals are alkaline in nature.
Answer:
True.

Question b.
Salt is acidic.
Answer:
False. (Salt is neutral)

Question c.
Metal corrodes due to salts.
Answer:
False. (Acids and bases corrode metals)

Question d.
Salts are neutral.
Answer:
True. (Not all salts neutral)

9. Classify the following substances into acidic, basic and neutral group:
HCl, NaCl, MgO, KCl, CaO, H₂SO₄, HNO₃, H₂O and Na₂CO₃.

Question a.
Classify the following substances into acidic, basic and neutral group:
HCl, NaCl, MgO, KCl, CaO, H₂SO₄, HNO₃, H₂O and Na₂CO₃.
Answer:

Group	Substances
Acid	HCl, H2SO4, HNO3
Base	CaO, MgO, Na2CO3
Neutral	H2O, NaCl, KCl.

Project:

Question a.
Write in your own language the uses and importance of neutralization reaction in daily life.

Class 8 Science Chapter 12 Introduction to Acid and Base Important Questions and Answers

Fill in the blanks:

Question 1.
Acid reacts with metal to form …………. gas.
Answer:
Acid reacts with metal to form hydrogen gas.

Question 2.
DNA is an acid present in our body, it decides …………. properties.
Answer:
DNA is an acid present in our body, it decides heredity properties.

Question 3.
The chemical formula of milk of magnesia is ………….
Answer:
The chemical formula of milk of magnesia is Mg (OH)₂.

Question 4.
…………. are used to control hyperacidity.
Answer:
Antacids are used to control hyperacidity.

Question 5.
Alkali has …………. taste.
Answer:
Alkali has bitter taste.

Question 6.
Proteins are made up of ………….
Answer:
Proteins are made up of amino acids.

Question 7.
…………. is used in batteries.
Answer:
Dil. H₂SO₄ is used in batteries.

Rewrite the following statements by selecting the correct options:

Question 1.
The colour of phenolphthalein indicator in alkaline solution is ………….
(a) yellow
(b) green
(c) orange
(d) pink
Answer:
The colour of phenolphthalein indicator in alkaline solution is pink.

Question 2.
…………. is sour to taste.
(a) An acid
(b) An alkali
(c) A salt
(d) Alcohol
Answer:
An acid is sour to taste.

Question 3.
When phenolphthalein is added to NaOH, the colour of the solution will become ……………… .
(a) colourless
(b) red
(c) pink
(d) yellow
Answer:
When phenolphthalein is added to 5 NaOH, the colour of the solution will become pink.

Question 4.
When phenolphthalein is added to HCl, the colour of the solution will be ………….. .
(a) red
(b) pink
(c) green
(d) colourless
Answer:
When phenolphthalein is added to HCl, the colour of the solution will be colourless.

Question 5.
…………. is a natural indicator.
(a) Phenolphthalein
(b) Methyl orange
(c) Litmus
(d) Methyl red
Answer:
Litmus is a natural indicator.

Question 6.
The litmus paper or the litmus solution is obtained from …………. plants.
(a) moss
(b) rose
(c) hibiscus
(d) lichen
Answer:
The litmus paper or the litmus solution is obtained from lichen plants.

Question 7.
…………. is not an alkali.
(a) Sodium hydroxide
(b) Potassium hydroxide
(c) Copper hydroxide
(d) Calcium hydroxide
Answer:
Copper hydroxide is not an alkali.

Question 8.
…………. is a weak acid.
(a) Hydrochloric acid
(b) Nitric acid
(c) Carbonic acid
(d) Sulphuric acid
Answer:
Carbonic acid is a weak acid.

Question 9.
When methyl orange is added to HCl, the colour of the solution will be …………… .
(a) red
(b) pink
(c) yellow
(d) colourless
Answer:
When methyl orange is added to HCl, the colour of the solution will be pink.

Question 10.
When blue litmus paper is added to NaOH, the colour of the litmus paper will be ……………. .
(a) blue
(b) red
(c) pink
(d) yellow
Answer:
When blue litmus paper is added to NaOH, the colour of the litmus paper will be blue.

State whether the following statements are true or false. If a statement is false, correct it and rewrite:

Question 1.
Red cabbage is a natural indicator.
Answer:
True

Question 2.
Fats of our body are formed by fatty acids.
Answer:
True.

Question 3.
Ammonium hydroxide is used in the production of fertilizers.
Answer:
True.

Question 4.
Lime water is a weak acid.
Answer:
False. (Limewater is a weak base)

Question 5.
Orange colour of methyl orange turns yellow in acid.
Answer:
False. (Orange colour of methyl orange turns pink in acid)

Question 6.
Methyl red turns yellow in alkali.
Answer:
True.

Question 7.
Oxalic acid is used in aerated cold drinks.
Answer:
False. (Carbonic acid is used in aerated cold drinks).

Find the odd one out and justify:

Question 1.
Acetic acid, carbonic acid, hydrochloric acid, nitric acid.
Answer:
Acetic acid. (Others are mineral acids.)

Question 2.
Hydrogen chloride, sodium hydroxide, calcium oxide, ammonia.
Answer:
Hydrogen chloride. (Others are bases.)

Question 3.
HCl, CH₃COOH, H₂SO₄, HNO₃
Answer:
CH₃COOH. (Others are strong acids.)

Question 4.
NaOH, Ca(OH)₂, NH₄OH, Ba(OH)₂
Answer:
NaOH (Others are weak bases.)

Question 5.
H₂SO₄, H₂CO₃, HCl, HNO₃
Answer:
H₂CO₃ (Others are strong acids.)

Question 6.
Citric acid, formic acid, lactic acid, nitric acid.
Answer:
Nitric acid. (Others are organic acids.)

Question 7.
Lime, litmus, phenolphthalein, methyl orange.
Answer:
Lime. (Others are indicators.)

Match the following:

Question 1.

Column ‘A’	Column ‘B’
1. Strong acid	a. Magnesium hydroxide
2. Weak alkali	b. Carbonic acid
3. Weak acid	c. NaOH
4. Strong alkali	d. Nitric acid

Answer:

Column ‘A’	Column ‘B’
1. Strong acid	d. Nitric acid
2. Weak alkali	a. Magnesium hydroxide
3. Weak acid	b. Carbonic acid
4. Strong alkali	c. NaOH

Question 2.

Column ‘A’	Column ‘B’
1. Sodium hydroxide	a. Whitewashing
2. Magnesium hydroxide	b. Fertilizers
3. Calcium hydroxide	c. Washing soap
4. Ammonium hydroxide	d. Antacid

Answer:

Column ‘A’	Column ‘B’
1. Sodium hydroxide	c. Washing soap
2. Magnesium hydroxide	d. Antacid
3. Calcium hydroxide	a. Whitewashing
4. Ammonium hydroxide	b. Fertilizers

Define the following:

1. Acid: A substance which gives H⁺ ions in water is called an acid.

2. Alkali: A substance which gives OH^– ions in water is called an alkali.

3. Indicator: Substances which change their colours in presence of acid or base are called indicators.

4. Neutralization: The reaction between an acid and an alkali to form the r salt and water is termed as neutralization.

Answer the following questions in one sentence each:

Question 1.
What are natural acids?
Answer:
Acids present in foodstuffs are called natural acids.

Question 2.
State three vegetables from which natural indicators can be prepared.
Answer:
Natural indicators: Red cabbage, radish, tomato.

Question 3.
State names of any three strong acids.
Answer:

1. Hydrochloric acid
2. Sulphuric acid
3. Nitric acid.

Question 4.
State the names of the acids found in lemon juice, Amla, tamarind water and curd.
Answer:

1. Lemonuice – citric acid
2. Amla – ascorbic acid
3. tamarind water – tartaric acid
4. curd – lactic acid.

Question 5.
State names of any three alkalis.
Answer:

1. sodium hydroxide
2. potassium hydroxide
3. calcium hydroxide.

Question 6.
State the names of three indicators.
Answer:

1. Litmus paper
2. Methyl orange
3. Phenolphthalein.

Question 7.
State the names of three weak alkalis.
Answer:

1. Calcium hydroxide
2. ammonium hydroxide
3. magnesium hydroxide.

Question 8.
From which plant is litmus obtained?
Answer:
Litmus is obtained from plants called lichens.

Question 9.
Name the antacid which is used to control the hyper acidity.
Answer:
Milk of magnesia [Mg(OH)₂] is used to control the hyper acidity.

Question 10.
How will you neutralize the excess of acid present in the soil?
Answer:
Lime stone or lime water is mixed in the soil to neutralize the excess of acid.

Question 11.
When lemonuice falls on a marble kitchen counter, which is the gas that bubbled out?
Answer:
Carbon dioxide.

Answer the following questions:

Question 1.
What are indicators?
Answer:
Substances which change their colours in presence of acid or base are called indicators.

Question 2.
State two acid-base indicators and mention their colour change.
Answer:
Phenolphthalein and methyl orange are two acid-base indicators. Phenolphthalein is colourless in an acidic solution while it turns pink in a basic solution. Methyl orange gives orange colour with an acidic solution and yellow colour with a basic solution.

Question 3.
State the colour change for each of the following solutions with red litmus, blue litmus, phenolphthalein and methyl orange solutions.
Answer:

Question 4.
Name the acid present in (1) Orange (2) Vinegar (3) Tamarind (4) Curd (5) Tomato (6) Lemon.
Answer:

Substance	Acid
Orange	Citric acid
Vinegar	Acetic acid
Tamarind	Tartaric acid
Curd	Lactic acid
Tomato	Oxalic acid
Lemon	Citric acid

Question 5.
Classify the following into acidic substances, basic substances and salts.
(1) Lime water, (2) soda water, (3) soap water, (4) sea water, (5) sweet limeuice, (6) sugar caneuice, (7) buttermilk, (8) a mixture of ash in water, (9) tamarind water.
Answer:
a. Acidic substances: (1) Soda water, (2) sweet limeuice, (3) buttermilk, (4) tamarind water.
b. Basic substances: (1) Lime water, (2) Soap water, (3) a mixture of ash in water.
c. Salts: (1) Sea water, (2) sugar caneuice.

Question 6.
What happens when sour substances like limeuice, tamarind water falls on shahabad stones or kitchen platform? Why?
Answer:
When sour substances like limeuice, tamarind water falls on shahabad stones or kitchen platform, citric acid present in limeuice and tartaric acid in tamarind water reacts with metal carbonates present in shahabad stones or kitchen platform, carbon dioxide gas is evolved resulting in the formation of uneven surface.

Question 7.
Collect soil samples from your surroundings and find out whether it is acidic or alkaline or neutral?
Answer:
Soil samples collected from the surroundings are acidic in nature.

Question 8.
Which substances are used to clean greenish stains on copper vessels and to shine blackish silver utensils?
Answer:
Tamarind pulp is used to clean greenish stains on copper vessels. To shine blackish silver utensils, ammoniacal solution or limeuice or detergent is used.

Question 9.
Why toothpaste is used for brushing teeth?
Answer:

1. Toothpaste contains fluorides and alkali to neutralize the mouth acid.
2. Hence, the tooth paste, which is generally alkaline, is used for cleaning the teeth as it can neutralize the excess acid in i the mouth and prevent tooth decay.

Question 10.
State the properties of acids.
Answer:

1. Acids are sour in taste.
2. Acid molecules contain hydrogen ion (H⁺) as a main constituent.
3. Acid reacts with metal to form hydrogen gas.
4. Acid reacts with carbonates and liberates CO₂ gas.
5. Blue litmus turns red in acid.

Question 11.
State the uses of acids.
Answer:

1. Acids are used in the production s of chemical fertilizers.
2. Acids are used in the production of explosives, oil purification, medicines, dyes and paints.
3. Hydrochloric acid is used for the preparation of different types of chloride salts.
4. Dil. H₂SO₄ acid is used in the batteries (electric cell).
5. Dil. HCl is used for sterilization of water.
6. Acid is used for making of white paper from wood pulp.

Question 12.
The iron knife shines better after cutting the sour fruits like lemon, raw mangoes. Why?
Answer:
Acids present in sour fruits clean and dissolves the salts present on the surface of iron knife as a result iron knife shines better after cutting the sour fruits.

Question 13.
What is meant by neutralization? Give example.
Answer:
When an acid reacts with an alkali to form a salt and water, it is called neutralization.

Give scientific reasons:

Question 1.
When we have stomachache, doctors prescribe medicine containing magnesium hydroxide.
Answer:

1. There is hydrochloric acid in our stomach which helps in the digestion of food.
2. Sometimes in the stomach, there is more hydrochloric acid than we need.
3. This excess acid causes acidity and indigestion resulting in stomachache.
4. When magnesium hydroxide is administered it neutralizes the extra acid in the stomach.
5. Therefore, magnesium hydroxide is the best cure for stomachache.
6. So, when we have stomachache, doctors prescribe medicine containing magnesium hydroxide.

Question 2.
Quicklime or slaked lime is added to the soil.
Answer:

1. When chemical fertilizers are added to the soil, the soil becomes acidic.
2. To reduce its acidity quicklime or slaked lime is added to the soil.

Question 3.
Tarnished and stained copper vessels are brought to a shine by using tamarind pulp.
Answer:
In due course, unus6d copper vessels
are covered with a coating of black copper oxide and other compounds of copper which tarnish the vessel. Tamarind contains tartaric acid. When the vessel is rubbed with tamarind pulp, tartaric acid reacts with copper oxide and removes the layer. Thus, the copper vessel regains its shine.

Question 4.
Copper and brass utensils are tinned.
Answer:
Copper and brass reacts with i organic acids present in food materials and poisonous salts are formed. Tin does not react with organic acids present in food materials. Therefore, copper or brass vessels are tinned.

Distinguish between acid and alkali. OR Distinguish between the following:

Question 1.
Acid and Alkali:
Answer:

Acid	Alkali
1. Acid has sour taste.	1. Alkali has bitter taste.
2. Acid turns blue litmus red.	2. Alkali turns red litmus blue.
3. An acid in an aqueous solution gives H+ ions.	3. An alkali in an aqueous solution gives OH+ ions.
4. Oxides of non – metals form acids.	4. Oxides of metals form bases.

Activity-based questions:

Activity 1:
Apparatus: Hibiscus, rose, turmeric, red cabbage leaves, filter paper, etc.
Activity: Rub red petals of hibiscus flower on the white filter paper. This gives hibiscus indicator paper. Similarly rub, rose petals on the white filter paper. Cut strips of this paper, it is a rose indicator paper. Take turmeric powder, add a little water in it. Dip filter paper or ordinary paper in the turmeric water for some time.

After drying make strips of that paper. Prepare turmeric indicator paper in this way. Put leaves of red cabbage in small quantity of water and heat it. Once solution of cabbage leaves cool down, dip papers in it and dry it. Make strips of dried paper. In this way prepare red cabbage indicator paper. Put some drops of following substances on the indicator papers prepared by the above method and write the effect in the following table:

Substance	Effect on turmeric paper	Acidic/basic
1. Lime juice	Yellow	Acidic
2. Lime water (calcium hydroxide)	Red	Basic
3.

Activity 2:
Take baking powder. Add a little water to it. Add this solution on to limeuice, vinegar, orangeuice, appleuice, etc. and note the findings.
What do you observe on addition of baking soda solution in the fruituice? Whether bubbles formed or effervescence came out of fruituice?
From the above first activity we came to know that yellow turmeric indicator paper’s turns red in certain solutions. Similarly on addition of baking soda solution in the acidic solution bubbles come out or effervescence is produced.
By these simple and easy activity we can identify acidic or alkaline substance:
[Note for Activity 1 and Activity 2: Students should perform the experiments under the guidance of school teachers and record their observations.]

Activity 3:
Under the guidance of teacher take limeuice, ammonium hydroxide (NH₄OH), dil. hydrochloric acid (dil. HCl) and nitric acid (HNOs) in different test-tubes. Add drops of following indicators in them. Also dip litmus papers in the solutions. Observe and record in the following table.

Balbharti Maharashtra State Board Class 6 Geography Solutions Chapter 4 Weather and Climate Notes, Textbook Exercise Important Questions and Answers.

Maharashtra Board Class 6 Geography Solutions Chapter 4 Weather and Climate

Class 6 Geography Chapter 4 Weather and Climate Textbook Questions and Answers

A. Who am I?

Question 1.
I keep on changing.
Answer:
Weather.

Question 2.
I am not the same in all places.
Answer:
Climate.

Question 3.
I am the solid state of water droplets.
Answer:
Snow.

Question 4.
I am present in the atmosphere in the form of vapour.
Answer:
Moisture.

B. Answer the following:

Question 1.
Why is the climate of Mahabaleshwar cool ?
Answer:
The climate of Mahabaleshwar is cool because it is situated at a high elevation. So, as we move upward from sea-level, the temperature of air decreases.

Question 2.
Why is the climate near the sea humid?
Answer:
The climate near the sea is humid because it contains greater amount of vapour mixed in the air.

Question 3.
What is the difference between weather and climate?
Answer:

Weather	Climate
(i) Weather is described on the basis of the conditions prevailing at the given time.	(i) Climate is described on the basis of conditions prevailing over a longer period of time.
(ii) Weather keeps changing frequently and we can experience the change easily.	(ii) Change in the climate takes place over a long ! period of time. These are not percieved easily.

Question 4.
What are the elements of weather?
Answer:
The elements of weather are:

• Temperature
• Air pressure
• Winds
• Moisture and
• Precipitation.

Question 5.
What effects do nearness to the sea and height above mean sea level have on the climate?
Answer:
Nearness to the sea leads to a humid climate whereas height above mean sea level will lead to a cool climate.

C. For the climatic conditions mentioned in the table, name the representative places known to you. (Use an atlas.)

Hot	Death valley
Hot and humid
Cold
Hot and dry
Cold and dry

Answer:

Hot	Death valley
Hot and humid	Amazon
Cold	Greenland
Hot and dry	Sahara desert
Cold and dry	Atacama desert

D. Complete the following table

Weather	Climate
Short-lived condition of the atmosphere
	Does not change quickly
Expressed with respect to a specific place
	Elements of climate: Temperature, pressure, winds, humidity and precipitation

Answer:

Weather	Climate
Short-lived condition of the atmosphere	Long-lived condition of the atmosphere
Keeps changing	Does not change quickly
Expressed with respect to a specific place	Expressed with respect to a specific region
Elements of weather: Temperature, pressure, winds, humidity and precipitation	Elements of climate: Temperature, pressure, winds, humidity and precipitation

Activity:

Understand the climate of your place with the help of your teacher.

Class 6 Geography Chapter 4 Weather and Climate InText Questions and Answers

Can you tell?

A. The weather conditions of a few places in India are as follows on 10th June. Use the table to answer the questions.

S. No.	Place	State	Time	Weather
(1)	Kochi	Kerala	12.30 pm	Cloudy
(2)	Bhopal	M.P.	12.30 pm	Hot and sunny
(3)	Mussoorie	Uttarakhand	12.30 pm	Cold weather mild sun

Question 1.
In which place will the clothes on a clothesline dry quickly? Why?
Answer:
In Bhopal the clothes on the clothesline will dry quickly. Due to the hot sun the water in the wet clothes get converted into vapour quickly.

Question 2.
In which place will they dry slowly? Why?
Answer:
Clothes will take longer time to dry in Mussoorie because of the medium heat and cold air.

Question 3.
Will the atmospheric conditions at these places always remain the same or will they change?
Answer:
The atmospheric conditions of these places will change from time to time.

B. Which of the following statements are applicable to the conditions that you have experienced today or yesterday at the place where you live?

• It was cold in the morning.
• In the afternoon it become hot and humid.
• It rained suddenly in the afternoon.
• Cool breeze was blowing in the morning.
• Clouds gathered in the evening.
• The night sky was full of stars and a pleasant breeze was blowing.

Answer:
Students have to give answer to this question depending on the weather condition of one particular day where they live.

C. Since childhood you have experienced summers, rainy seasons and winters. On the basis of your experience answer the following questions.

Question 1.
In which months do summer, monsoon season and winter occur in a year from January to December? Show it in a chart.
Answer:

Summer	Rainy season	Winter
February to May	June to September	October to January

Question 2.
Which special clothes do we use if it is raining?
Answer:
If it is raining, we wear a raincoat or carry an umbrella.

Question 3.
When do we use woollen clothes?
Answer:
We wear woollen clothes in winter.

Question 4.
In which season do we mainly use thin cotton clothes?
Answer:
We wear cotton clothes in summer.

Use your brain power!

Question 1.
Which occupation will you practice in cold regions?
Answer:
Occupations practiced in cold region are lumbering and agriculture.

Question 2.
Which occupations will you practice in hot region?
Answer:
Occupations practiced in hot regions are animal husbandry and agriculture.

Observe the following map and write the answer to the question given below it.

Question 1.
An Indian Meteorological Department image of the storm that visited in November 2014 was shown. Tell in which sea the storm was located.
Answer:
Bay of Bengal.

Class 6 Geography Chapter 4 Weather and Climate Additional Important Questions and Answers

Fill in the blanks with the right option in the brackets:

Question 1.
Atmospheric conditions prevailing at a place and at a given time is called ______. (wind, weather, climate)
Answer:
weather

Question 2.
The temperature goes on ______ from the equator towards both the poles. (decreasing, increasing, being constant)
Answer:
decreasing

Question 3.
The horizontal movement of air is called ______. (pressure, humidity, wind)
Answer:
wind

Question 4.
_____ is defined by elements such as temperature, wind and humidity. (precipitation, weather, climate)
Answer:
weather

Question 5.
The air that has greater amount of vapour is called _____ air. (dry, hot, humid)
Answer:
humid

Question 6.
The humidity in the atmosphere is called _______. (moisture, oxygen, heat)
Answer:
moisture

Question 7.
The proportion of moisture in the atmosphere depends on ________.(winds, temperature, air pressure)
Answer:
temperature

Question 8.
Vapour in the atmosphere condenses into water droplets or snow and their showering on the earth is called ________.(precipitation, wind, climate)
Answer:
precipitation

Match the pairs correctly:

Question 1.

A	B
(1) Winds	(a) hailstorm
(2) Moisture	(b) solar energy
(3) Precipitation	(c) the difference in air pressure
(4) Temperature	(d) vapor
(5) Weather	(e) hot, cool, dry, sultry
	(f) humidity

Answer:
1 – c
2 – d
3 – a
4 – b
5 – e

Name the following statements:

Question 1.
Elements of weather:
Answer:
Temperature, pressure, winds, humidity and precipitation.

Question 2.
Forms of precipitation:
Answer:
Rainfall, snowfall and hailstorm.

Question 3.
Climate is generally expressed as:
Answer:
‘Cool and dry ‘or ‘hot and humid’ or ‘hot and dry’, etc.

Question 4.
Factors influencing climate:
Answer:
Latitudinal position, height above sea level, nearness to ocean and oceanic currents.

Answer the following questions in one sentence:

Question 1.
What is precipitation?
Answer:
Vapour in the atmosphere condenses into water droplets or snow particles, which shower on the earth. This is called as precipitation.

Question 2.
What is called air pressure?
Answer:
Air has weight and as a result it creates pressure. This is called air pressure.

Question 3.
What is wind?
Answer:
Air moving from high pressure towards low pressure areas in a horizontal direction is called wind.

Question 4.
What is called humid air?
Answer:
The atmosphere contains vapour. The air that has greater amount of vapour is called humid air.

Give geographical reasons for the following statements:

Question 1.
As we move upward from the sea-level, temperature of the air decreases.
Answer:

• The earth’s surface gets heat from the Sun.
• Thus, the surface gets heated.
• The air close to the earth surface starts becoming hot.
• Later, different layers of air at higher elevation receive heat.
• Therefore, as we move upward from sea-level, the temperature of air decreases.

Question 2.
Air pressure decreases with increasing height.
Answer:

• The lowermost layers of air are subjected to the pressure of the upper layers.
• So, the density of the lower layers of air increases.
• There is greater air pressure near the surface of the earth.
• Therefore, air pressure decreases with increasing height.

Answer the following questions:

Question 1.
What is known as precipitation?
Answer:
Vapour in the atmosphere condenses into water droplets or snow particles. Their showering on the earth is called precipitation.

Question 2.
What is called moisture?
Answer:
The humidity in the atmosphere is called moisture. The proportion of moisture in the atmosphere depends on the temperature. Air with higher temperature holds a greater amount of moisture.

Balbharti Maharashtra State Board Class 6 Geography Solutions Chapter 9 Energy Resources Notes, Textbook Exercise Important Questions and Answers.

Maharashtra Board Class 6 Geography Solutions Chapter 9 Energy Resources

Class 6 Geography Chapter 9 Energy Resources Textbook Questions and Answers

A. What resource will have to be used for the following work:

Question 1.
Rohan wants to fly a kite.
Answer:
Wind Energy

Question 2.
People in an Adivasi hamlet have to be protected from the cold.
Answer:
Wood

Question 3.
Cooking on a picnic.
Answer:
Wood

Question 4.
Salma wants to iron her clothes.
Answer:
Electricity

Question 5.
Starting a railway-engine.
Answer:
Thermal Energy

Question 6.
Heating water for a bath.
Answer:
Electricity

Question 7.
After sunset, making light available inside the house.
Answer:
Electricity

B. Answer the following questions:

Question 1.
Which energy resources does man use the most? Why?
Answer:
(i) The energy resource we use the most is oil as it has a wide array of uses. It is used as fuel which includes petrol, diesel, kerosene, jet fuel, LPG gas, etc.

(ii) It is also used in cosmetics, medicines, paints, lubricants, etc.

Question 2.
Why are energy resources needed?
Answer:

• The demand for energy resources is increasing due to growing population, urbanisation and growing needs of man.
• Energy resources are needed to prepare food, generate electricity, to propel vehicles and for other domestic and industrial needs.
• We engage in various activities to fulfill our needs, for which we need energy from natural resources.
• Our life will come to a standstill without resources like petrol, wind, natural gas, sunlight, besides other resources.

Question 3.
Why do we need to use environment friendly energy resources?
Answer:

• There are many energy resources which are environment-friendly, which are renewable and which aid in harnessing natural processes.
• When we use environment-friendly energy sources such as solar energy, wind energy, energy from waste, etc.
• We are contributing towards environment conservation, preservation and protection.
• This will help in reducing the deterioration of environment due to use of non-eco friendly energy resources apart from reducing problems arising from pollution caused due to burning of fossil fuels and biomass energy, climate change, etc.
• Environment-friendly resources will not only lead to sustainable development but also provide energy security which is the need of the hour.

C. Explain the differences using the points in the brackets:
(availability, environment-friendliness,advantages and drawbacks)

Question 1.
Mineral oil and solar energy
Answer:

Points	Mineral oil	Solar energy
Availability	(i) Limited in nature as it does not last perpetually.	(i) Availability depends on the intensity of sunrays and the duration of sunshine.
Environment-friendliness	(i)  It is not environment friendly as its generation leads to pollution. (ii)  Being highly inflammable it may cause damage to the environment.	(i) Being pollution-free this is an environment-friendly source of energy.
Advantages	(i)  Cheap source of energy. (ii)  Aids in thermal and atomic power generation.	(i)  A solution to global warming. (ii)  Cost effective, provides energy security.
Drawbacks	(i)  Pollutes the environment. (ii)  Highly inflammable.	(i)  Solar panels stop producing electricity after sunset. (ii)  Expensive to store this energy.

Question 2.
Hydel power and power from geothermal source
Answer:

Points	Hydel power	Power from geothermal sources
Availability	(i) Obtained from the kinetic energy of running water which is easily available.	(i) Underground heat is utilized to generate power and it is inexhaustible.
Environment-friendliness	(i) Does not cause any degradation of the environment.	(i) It is an exhaustible energy resource that causes minimum pollution.
Advantages	(i) Reuse of water is possible. Easy availability of water in most places. Energy generation is pollution-free.	(i) If used on a large scale and more efficiently it may reduce global warming.
Disadvantages	(i) When water is not available it can’t produce electricity. (ii) Humans, flora, and fauna may lose natural habitat when hydel power plants are set up.	(i) Only a few sites have the potential to establish geothermal power plants. (ii) High installation cost is involved. (iii) The energy generation capacity is too small.

Activity:

Show the power generation centres on an outline map of India. Write about one of them. Supplement the information with pictures.

Class 6 Geography Chapter 9 Energy Resources InText Questions and Answers

Can you tell?

Observe the pictures and answer the questions:


Question 1.
Which energy resource is used in figure 1 to obtain light?
Answer:
Kerosene.

Question 2.
Where does this resource come from?
Answer:
It is found under the land surface and also below the ocean floor.

Question 3.
Figure 2 shows fuel being filled in a motor car. From where was the energy resource brought to the pump?
Answer:
Fuel comes to the pump from petroleum refinery, an industrial process plant where crude oil is being processed and refined.

Question 4.
Figure 3 shows Malati with her pinwheel and her father winnowing grain. Who is helping both of them?
Answer:
Wind energy.

Question 5.
Which energy resource is used for lighting a lamp, running a rickshaw and heating oil as shown in figure 5?
Answer:
LPG is used for lighting a lamp and heating oil and CNG is used for running a rickshaw.

Question 6.
What are the various purposes for which man use sunlight?
Answer:
For growing foodgrains, drying clothes, heating water and cooking food, to generate electricity and for multiple other uses we use sunlight.

Question 7.
For which of the above energy resources do we have to spend money?
Answer:
We have to spend money for mineral oil and natural gas.

Observe the map and answer the questions given below:

Question 1.
Name the states which have coal fields
Answer:
Odisha, Chhattisgarh, Jharkhand, Madhya Pradesh, Maharashtra, West Bengal and Gujarat.

Question 2.
Name the mineral oil field in the Arabian Sea.
Answer:
Mumbai High.

Question 3.
Name two states which have coal fields on a large scale.
Answer:

• Chhattisgarh
• Jharkhand

Question 4.
Which mineral oil fields are located in North¬east India?
Answer:
Makum, Digboi, Naharkatiya, Nunmati, Lakhani.

Question 5.
The reserves of which mineral are found in the Godavari Basin?
Answer:
Coal reserves are found in the Godavari Basin.

Question 6.
Which of the states have mineral reserves in the Godavari basin?
Answer:
Telangana, Chhattisgarh, Maharashtra and Madhya Pradesh.

Question 7.
Name four hydel power stations in our state.
Answer:
Koyna Hydroelectric project, Jayakwadi Hydroelectric project, Sardar Sarovar Hydroelectric project, Warna Hydroelectric project.

Question 8.
What kind of energy is produced with the help of the devices shown in the photograph?
(Pg. 59 Text Book)

Answer:
Solar Energy is generated.

Class 6 Geography Chapter 9 Energy Resources Additional Important Questions and Answers

Fill in the blanks choosing the correct options:

Question 1.
In ______ it is necessary to bumthe energy resources directly to generate electricity, (geo-thermal power stations, thermal power stations, hydel power stations)
Answer:
thermal power stations

Question 2.
In villages, ______ is used on a large scale for cooking on earthen stoves. (wood, kerosene, liquid petroleum gas)
Answer:
wood

Question 3.
Low quality coal is used for _________ .(industries, thermal power station, cooking)
Answer:
cooking

Question 4.
High quality coal is used in ________.(geo-thermal power stations, thermal power stations, hydel power stations)
geo-thermal power stations

Question 5.
Mineral oil is obtained from under land surface and also ________.(below the ocean floor, on the land surface, decomposed plants and animals)
Answer:
below the ocean floor

Question 6.
Mineral oil reserves are ________ in nature. (limited, unlimited, low)
Answer:
limited

Question 7.
________ oil is in great demand. (Coal, Mineral, Gas)
Answer:
Mineral

Question 8.
Mineral oil is also called _________.(magic oil, priceless treasure, black gold)
Answer:
black gold

Question 9.
__________ originate from the remains of dead plants and animals. (Bio-fuels, Hydel power, Kinetic energy)
Answer:
Bio-fuels

Question 10.
________is used in sailboats. (Solar energy, Wind energy, Geo-thermal energy)
Answer:
Wind energy

Question 11.
For power generation a wind speed of 40 to _______ is required. (90 kmph, 100 kmph, 50 kmph)
Answer:
50 kmph

Question 12.
Intensity of solar energy is the maximum in the ______ zone. (torrid, temperate, frigid)
Answer:
torrid

Question 13.
______ can be used on a large scale in a peninsular country like India. (Tidal energy, Geo-thermal, Wind energy)
Answer:
Tidal energy

Question 14.
Underground heat is utilised to generate _________.(hydel power, tidal energy, geo-thermal energy)
Answer:
geo-thermal energy

Match the pairs correctly:

Question 1.

Column A	Column B
(1) Hydel power	(a) power generated with the help of the speed and force of waves
(2) Atomic energy	(b) power obtained from the kinetic energy of running water
(3) Tidal energy	(c) underground heat is utilised to generate power
(4) Geo-thermal energy	(d) splitting of the atoms of minerals like uranium and thorium
(5) Wind energy	(e) solar energy
	(f) kinetic energy

Answer:
1 – b
2 – d
3 – a
4 – c
5 – f

State whether the following statements are true or false, correct the wrong statement:

Question 1.
All substance-based energy resources are conventional.
Answer:
False. Except for atomic energy, all other resources are conventional.

Question 2.
In the long run, process-based energy resources are environment-friendly.
Answer:
True

Question 3.
Kinetic energy can be used to generate power or electricity.
Answer:
True

Question 4.
Low quality coal is used in industries.
Answer:
False. Low quality Ooal is used in cooking while high-quality coal is used in industries.

Question 5.
Hydel power is not an environmental-friendly energy resource.
Answer:
False. Hydel power obtained from the kinetic energy of running water does not cause any degradation of the environment so it is environment-friendly.

Question 6.
Solar energy is maximum in the torrid zone.
Answer:
True

Question 7.
Tidal energy is pollution free and everlasting.
Answer:
True

Name the following:

Question 1.
Two examples of substance-based energy resources:
Answer:

• Coal
• Mineral oil

Question 2.
Two examples of process based energy resources.
Answer:

• Sun
• Wind

Question 3.
Energy resources which originate from the remains of dead plants and animals:
Answer:
Bio-fuels

Question 4.
Two countries which use atomic energy:
Answer:

• India
• USA

Question 5.
Two hydel power stations of India:
Answer:

• Bhakra-Nangal in the Punjab
• Koyna in Maharashtra

Question 6.
States in India where windmills have been erected:
Answer:

• Maharashtra
• Karnataka

Question 7.
Devices which can be run on solar power:
Answer:

• Lamps
• Heaters

Question 8.
Two places where hot water springs are seen:
Answer:

• Vajreshwari in Maharashtra
• Manikaran in Himachal Pradesh

Answer the following questions in one sentence each:

Question 1.
How are energy resources classified?
Answer:
Energy resources can be classified in many ways such as conventional – non-conventional, biotic – abiotic, renewable – non-renewable, substance-based – process-based, etc.

Question 2.
Write any one difference between: Substance-based energy resources and process based energy resources.
Answer:
Generation of substance-based energy resources leads to pollution while that of process based energy resource is pollution free.

Question 3.
Write any one use of kinetic energy.
Answer:
Kinetic energy can be used to generate power or electricity.

Question 4.
How was coal formed?
Answer:
Long ago, plant and animal remains got buried due to earth movements and they were then decomposed due to pressure and heat, leaving behind the element carbon and this is how coal was formed.

Question 5.
Apart from mineral oil what else is found in mineral oil wells?
Answer:
In most of the mineral oil wells, apart from minerals, natural gas is also found.

Question 6.
Which are the biotic waste materials from which biogas is generated?
Answer:
Biogas is generated from biotic waste material such as faeces of animals, dead leaves, shells, etc.

Question 7.
Why have some farmers raised biogas plants in their own yards?
Answer:
Some farmers have raised biogas plants in their own yards to cater to their domestic needs.

Question 8.
Which is the major problem faced by major metropolitan cities?
Answer:
Waste disposal is the major problem faced by major metropolitan cities.

Question 9.
How is wind energy used to generate electricity?
Answer:
Due to speed of the wind, the windmills turn, generating kinetic energy which in turn is further converted into electricity.

Question 10.
What does generation of solar power depend on?
Answer:
The generation of solar power depends on the intensity of sunrays and the duration of sunshine.

Question 11.
Which are the movements of ocean water that go on continuously?
Answer:
Sea waves and tides are the movements of ocean water that go on continuously

Give geographical reasons for the following statements:

Question 1.
Several changes took place in the use of energy resources and devices.
Answer:

• We engage in various activities to fulfill our needs, for which we need energy.
• In the past, human labour and animals were used for many tasks.
• Gradually man’s needs increased and with it, several changes took place in the use of energy resource and devices.

Question 2.
The cost of mineral oil is very high.
Answer:

• Mineral oil reserves are limited in nature.
• However, this oil is in great demand. Hence its cost is very high.

Question 3.
Mineral oil is called ‘black gold’.
Answer:
Mineral oil is called ‘black gold’ because it has a blackish colour and it is costly.

Question 4.
In India, there is a lot of scope for using solar energy.
Answer:

• We get light and heat from the sun.
• We have seen that intensity of solar energy is the maximum in the torrid zone.
• India which is in the torrid zone, therefore, has a lot of scope for using solar energy.

Question 5.
Process-based energy resources are environment-friendly.
Answer:
The process-based energy resources cause minimum pollution. So, process-based energy resources are environment-friendly.

Answer in 2-3 sentences:

Question 1.
Energy from waste material can help solve the problem of waste disposal in cities. Explain.
Answer:

• Waste is generated daily on a very large scale in a big metropolitan cities.
• Waste disposal is a major problem in such places.
• This waste can be segregated to use the biotic component to generate gas which can be used to generate power.
• In the future, this may help to solve the problem of waste disposal in cities

Question 2.
Explain the term atomic energy.
Answer:

• Splitting of the atoms of minerals like uranium and thorium can be used for power generation.
• In this process, using very small quantities of minerals, energy can be generated on a very large scale.

Question 3.
How must we use energy resources?
Answer:

• Energy resources must be used very carefully.
• The demand for energy is increasing all the time due to growing population, urbanisation and growing needs of man. ,
• It is necessary to use alternative and non- conventional energy resources to meet these needs.
• It is also necessary to use energy frugally.

Balbharti Maharashtra State Board Class 7 History Solutions Chapter 13 Life of the People in Maharashtra Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 7 History Solutions Chapter 13 Life of the People in Maharashtra

Class 7 History Chapter 13 Life of the People in Maharashtra Textbook Questions and Answers

1. Complete the chart.

Answer:

2. Which undesirable customs are prevalent in today’s society ? Suggest measures for their eradication.
Answer:
The bad traditions prevalent in the society are:

• No Education for girls.
• Female infanticide.
• Dowry.
• Animal sacrifice
• Superstitions.
• Bonded labour.

The ways to get rid of these bad traditions are:

• Special provisions for girl’s education.
• Awareness programme for women.
• Inculcating scientific attitude.
• Special law to protect the women and girl child.
• Thinking positive, parental guidance to think in a systematic way, to get science knowledge update to disperse the blind belief will eradicate superstition.

3. Make a detailed notes of the festivals and auspicious days in your area.
Answer:
(a) Diwali, Holi, Mahashivaratri, Eid, Raksha Bandhan, Navaratri, Krishna Janmashtami, Gurpurabh, Parsi new year, Onam are celebrated with great pomp and show in our area.

(b) Sanskasthi Chaturthi, Ekadashi, Akshaya Tritiya etc., are some of the auspicious days celebrated in our area.

4. Use the following points to compare life in the era of Shivaji Maharaj and today’s life.

S. No.	Point	At the time of Shivaji Maharaj	Today
(1)	Transactions	……………	…………
(2)	Houses	…………….	Permanent, Well-constructed cement-concrete multi-storeyed house.
(3)	Transportation	………….	Bus, Railway and Aeroplane.
(4)	Entertainment	……………	…………….

Answer:

S. No.	Point	At the time of Shivaji Maharaj	Today
(1)	Transactions	Barter system	Coins, Paper money, Plastic money, Currency – Rupee, Cashless transaction through banks.
(2)	Houses	Village Houses: Made with simple mud and bricks. Cities- Wadas with one or two storeys.	Permanent, Well-constructed cement-concrete multi-storeyed house.
(3)	Transportation	Bullock cart, Horseback, Boat	Bus, Railway and Aeroplane.
(4)	Entertainment	Tamasha, Ballads on Dap	Music, Drama, Dance, Watching Television, Play, movie, Opera etc.

Activity

Gather information about the capable women of our country and read it aloud in your class, e.g. information on P.V. Sindhu, Sakshi Malik.

Class 7 History Chapter 13 Life of the People in Maharashtra Textbook Questions and Answers

Complete the sentence by choosing the appropriate words from the options given below:

Question 1.
The Patils were given some land as Inam for his job as a _____. (Patil, Jagir, Watans)
Answer:
Patil

Question 2.
For any major or minor events or for battles an ______ was checked. (Time, Muhurta, Place)
Answer:
Muhurta

Question 3.
The _______ festival was celebrated on a large scale during the Peshwa Era. (Ganesh, Diwali, Makar Sankranti)
Answer:
Ganesh

Question 4.
______ script was used for day to day affairs. (Marathi, Sanskrit, Modi)
Answer:
Modi

Question 5.
______ was very popular sport. (Wrestling, Mallakhamb, Martial arts)
Answer:
Martial arts

Question 6.
The Jain Mandir at Jamod in Vidarbha had paintings of Jin Charitra, ______ stories (mythological, various festivals, animals)
Answer:
Mythological

Question 7.
________ was popular as an entertainment programme during the Peshwa Era. (Stage show, Tamasha, Lavani)
Answer:
Tamasha

Question 8.
_______ was a well-known painter. (Mallamma Desai, Gopikabai, Gangaram Tambat)
Answer:
Gangaram Tambat

Question 9.
The letters were carried by _______and messengers. (Birds, Camel riders, Post)
Answer:
Camel riders

Question 10.
People used to believe in ______ a lot. (astrology, scientific vision, dreams)
Answer:
astrology

Match the following:

Question 1.

Column ‘A’	Column ‘B’
(1) Festival	(a) Mankoji
(2) Sport	(b) Bail-Pola
(3) Sculpture	(c) Mallakhamb
(4) Ghat	(d) Ghrishneshwar Temple
(5) Painter	(e) Toke

Answer:
1 – b
2 – c
3 – d
4 – e
5 – a

Question 2.

Column ‘A’	Column ‘B’
(1) The Patils	(a) To manage the revenue
(2) The Kulkarni	(b) To protect the village
(3) Black Soil,	(c) Work in an office
(4) White-collared	(d) Farmers

Answer:
1 – b
2 – a
3 – d
4 – c

Answer in one or two sentences:

Question 1.
What was the chief source of production at the village level during the Peshwa era?
Answer:
Agriculture and agriculture based businesses were die chief source of production at the village level.

Question 2.
When was Ganesh festival celebrated?
Answer:
Ganesh festival was celebrated every year Bhadrapad Chaturthi to Anant Chaturdashi.

Question 3.
Which festivals were celebrated during Diwali?
Answer:
During Diwali the Balipratipada and Bhau- beej days were celebrated on large scale.

Question 4.
What were organised during the Jatras days?
Answer:
Wrestling Match were Organised during the Jatras days.

Question 5.
Which Subjects were taught in Pathshalas and Madarasas?
Answer:
Writing, reading, accounting were taught in Pathshalas and Madarasas.

Question 6.
Which games were played during the Peshwa Era?
Answer:
Martial arts were very popular, Mallakhamb Dand, Wrestling, Lathi, Dandpatta, Bothati these games were played.

Question 7.
What was the religious policy of Chhatrapati Shivaji Maharaj?
Answer:
(i) Chhatrapati Shivaji Maharaj had a liberal religious policy.
(ii) He believed that everyone should follow his or her own religion but nobody should force his or her religion upon others.

Question 8.
What did the daily meal of the people consist of?
Answer:
The daily meal consisted of Bhakari, onion, chutney and gravy.

Question 9.
What did men and women use to wear during that period?
Answer:
(a) Men used to wear dhoti, kurta, angarakha, turban.
(b) Women use to wear sarees (nine-yard) and blouses.

Question 10.
What were used in Wada decoration?
Answer:
Artwork, decorative painting, firewood, sculptures, mirrors were used in wada decoration.

Name the following:

Question 1.
The land was given as inam to Patils do the job.
Answer:
Patilaki

Question 2.
Festival celebrated on large scale.
Answer:
The Ganesh festival.

Question 3.
Crops grown.
Answer:
Jowar, bajra, wheat, nachni, corn, rice etc.

Question 4.
Education was given in.
Answer:
Pathshalas and Madarasas.

Question 5.
Modes of transport.
Answer:
Ghat roads, the bridges on the river, boats.

Question 6.
Means of communication.
Answer:
Camel riders and Messengers.

Question 7.
Popular outdoor games.
Answer:
Hututu, Kho-kho and Atyapatya.

Question 8.
Learned women in the Peshwa Era.
Answer:
(a) Veermata Jijabai
(b) Maharani Yesubai
(c) Maharani Tarabai
(d) Umabai Dabhade.

Question 9.
Famous architect during that period.
Answer:
Hiroji Indulkar.

Answer in brief:

Question 1.
Discuss everyday living of the people in that Era.
Answer:
Most of the people were staying in the village. The villages were self sufficient.

(a) Crops grown: The farmers grown the crops like jowar, bajra, wheat, nachani, com, rice etc.

(b) Food: The farmers’ daily meal consisted of bhakari, onion, chutney and gravy. Rich people’s meal consisted of rice, dal-varan, chapatis, vegetables, salads and milk products.

(c) The transaction in rural area were based on barter system.

(d) Houses: The houses were simple and were made of soil and bricks.

(e) Clothing :
(i) Men wear – Dhoti, Kurta, Angarakha, Turban.
(ii) Women wear – Saree (nine yard) and blouse.

Question 2.
The life of women’s during Peshwa Period.
Answer:
(a) Their world were confined to the house of first their father and then their husband.

(b) Their education was neglected.

(c) Only a few exceptional women had achieved any progress in literacy, administration and battle skills.

(d) They include Veermata Jijabai, Maharani Yesubai, Maharani Tarabai, Umabai Dabhade, Gopikabai, Punyashlok Ahilyabai.

(e) Customs like child marriage, unequal marriage, widowhood, keshwapan, sati, polygamy had imposed harsh restrictions on the way women lived.

Balbharti Maharashtra State Board Class 7 History Solutions Chapter 12 Progression of the Empire Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 7 History Solutions Chapter 12 Progression of the Empire

Class 7 History Chapter 12 Progression of the Empire Textbook Questions and Answers

1. Answer in one word:

Question 1.
She took the charge of the Indore administration.
Answer:
Ahilyabai Holkar

Question 2.
The most capable and brave man in Nagpurkar Bhosale family.
Answer:
Raghuji

Question 3.
He reinstated the Emperor on the throne of Delhi.
Answer:
Mahadji Shinde

Question 4.
He managed politics in the South.
Answer:
Nana Phadnavis

2. Arrange chronologically:

• The battle of Ashti.
• Maratha dominance over Odisha.
• The British hoisted the Union Jack in Pune.

Answer:

• Maratha dominance over Odisha.
• The battle of Ashti.
• The British hoisted the Union Jack in Pune.

3. Write briefly:

Question 1.
The work done by Ahilyabai Holkar.
Answer:

• She created new laws for agricultural tax and tax recovery.
• She brought barren land under cultivation.
• Dug wells for farmers.
• She promoted trade and industry.
• Built water reservoirs.
• She constructed mandirs, ghats, matts and dharamshalas.
• Provided water facilities over India.
• She brought cultural integration in the country.

Question 2.
The valour shown by Mahadji Shinde.
Answer:
(a) He played a major role in re-establishing the Maratha power in the North after the defeat of the Marathas at Panipat.

(b) He realised that guerilla tactics would not be any more useful so he trained and modernised his army under a French military expert de Boigne.

(c) With this trained army, he defeated the Rohillas, the Jats, the Rajputs and the Bundellas.

(d) Mahadji managed the difficult affairs with strong determination and looked after the Delhi affairs during CE 1784 to CE 1794.
The Mughal Emperor honoured him with the title Vakil-i-Mutlak.

Question 3.
The Maratha rule in Gujarat.
Answer:
(a) General Khanderao Dabhade and his son laid the foundation of Maratha power in Gujarat.

(b) After the death of Khanderao, his wife Umabai took the charge, bravely fought the battle with Mughal Sardar at Ahmadabad and captured a fort.

(c) The Gaikwads made Vadodara their centre of power.

4. Discuss the reasons behind the end of the Maratha rule.
Answer:
The reasons behind the end of Maratha rule were:

(a) After the death of Mahadji Shinde and Nana Phadnavis, the Maratha power started declining.

(b) Raghunathrao’s son, Bajirao II the Peshwa did not have leadership qualities which could create solidarity among the Maratha Sardars.

(c) Maratha power got weakened due to these differences among the Maratha Sardars.

(d) The supremacy of the Marathas declined in the North and the South during the period of Bajirao II.

(e) The British dethroned the Maratha power and became the rulers

Activity:

Create a pictorial chart to show the families that contributed to the expansion of the Maratha power. Exhibit it in your school.

Class 7 History Chapter 12 Progression of the Empire Additional Important Questions and Answers

Complete the sentence by choosing the appropriate word from the options given below:

Question 1.
The Gaikwads made _______ in Gujarat a seat of their power. (Vadodara, Ahmadabad, Surat)
Answer:
Vadodara

Question 2.
_____ was the founder of the Holkar rule in Indore. (Mahadji, Malharrao, Raghunathrao)
Answer:
Malharrao

Question 3.
_____ managed to take care of the politics in the South. (Nana Phadnavis, Kanhoji, Khanderao)
Answer:
Nana Phadnavis

Question 4.
________ strengthened the naval power of Shivaji. (Patwardhan, Bhosale of Nagpur,Kanhoji Tulaji Angre)
Answer:
Kanhoji Tulaji Angre

Question 5.
During the reign of _____ there was a complete breakdown of the Maratha power. (Ahilyabai, Bhosale, Bajirao-ll)
Answer:
Bajirao-ll

Question 6.
_____ laid the foundation of Maratha power in Gujarat. (Khanderao Dabhade, Madhavrao, Raghuji)
Answer:
Khanderao

Question 7.
Malharrao Holkar was well versed in ________ (Sword fighting, Martial art, Guerrilla Warfare)
Answer:
Guerrilla warfare

Question 8.
The British managed to get the rights of the _______ of the Bengal region. (Diwani, Chauthai, Sardeshmukhi)
Answer:
Diwani

Question 9.
Delhi was under the influence of Maratha power till ______. (1803 CE, 1807 CE, 1819 CE)
Answer:
1803 CE

Question 10.
British defeated the Marathas in the battle of Ashti in Solapur in _________. (CE 1818, CE 1820, CE 1814)
Answer:
1818 CE

Match the following:

Question 1.

Column ‘A’	Column ‘B’
(1) Khanderao Dabhade’s wife	(a)  Raghuji Bhosale
(2) The most capable and brave Maratha Sardar.	(b) Umabai
(3) Mahadji’s death	(c) Akhilyabai Holkar
(4) She played a role in the judiciary	(d) Wanawadi (e) Wadgaon

Answer:
1 – b
2 – a
3 – d
4 – c

Answer in one word:

Question 1.
Title conferred to Mahadji Shinde.
Answer:
Vakil-i-Mutlak (Chief agent of the Emperor)

Question 2.
An expert in guerilla tactics.
Answer:
Mahadji Shinde

Question 3.
She was the wife of Khanderao, Malharrao’s son.
Answer:
Ahilyabai Holkar

Question 4.
Managed the supremacy in the South.
Answer:
Nana Phadnavis

Question 5.
Peshwa who didn’t have leadership qualities.
Answer:
Bajirao II

Question 6.
Appointed as Sardar in the North.
Answer:
Ranoji Shinde

Answer in one or two sentences:

Question 1.
Which regions were given as jagirs to Parasoji by Shahu Maharaj?
Answer:
Varhad and Gondawan were given to Parasoji by Shahu Maharaj.

Question 2.
What rights were assigned to Raghuji?
Answer:
Raghuji Bhosale was assigned the Chauthai rights of Bengal, Bihar and Odisha.

Question 3.
Who laid the foundation of the Maratha power in Gujarat?
Answer:
Khanderao Dabhade and his son Trimbakrao laid the foundation of the Maratha power in Gujarat.

Question 4.
Why did Mahadji Shinde train his army?
Answer:
Mahadji Shinde trained his army because the Marathas generally used the guerrilla tactics in 1 the hilly regions of the South. But would not be
suitable in the plains of the North.

Question 5.
What was the contribution of Punyashloka Ahilyabai?
Answer:
(a) Punyashloka Ahilyabai ruled for twenty-eight years and enhanced the Maratha prestige in the North.
(b) She brought peace and order in her kingdom and made her people happy.

Question 6.
What was crystal clear amongst the British and Marathas?
Answer:
It was crystal clear that whoever will rule India will be ultimately decided by the war between the Marathas and the British.

Give reason:

Question 1.
Mahadji Shinde conferred the title of Vakil-i- Mutlak (Chief agent of the Emperor).
Answer:
British wanted to take the Delhi Emperor in their captivity. Even though the conditions were unfavourable, Mahadji Shinde defeated the British and again reinstated the Emperor on the throne. The Emperor was pleased with his bravery and conferred the title of Vakili- Mutlak. (Chief Agent of the Emperor).

Question 2.
The Maratha Sardars became successful in establishing the supremacy in North and South India.
Answer:
After the death of Madhavrao Peshwa, the Maratha Empire went in a disarray, Nana Phadnavis and Mahadji Shinde brought it back to normal. Mahadji was busy in the North to establish the supremacy of Marathas, Nana Phadnavis managed to take care of the politics in South. Leadership and capability helped the Maratha power to reach to a new pinnacle. Hence the Maratha Sardar became successful in establishing the supremacy in north and south India.

Question 3.
The supremacy of Marathas in the North and the South declined in the times of Bajirao II.
Answer:
Bajirao II became the Peshwa. He didn’t have any leadership qualities. On the contrary he had many vices. He couldn’t create solidarity amongst the Maratha Sardars. Because of many such reasons, the supremacy of the Maratha power in the North and the South declined in the times of Bajirao II.

Write short notes on:

Question 1.
Malharrao Holkar
Answer:

• He was the founder of the Holkar rule at Indore.
• He served the Maratha kingdom for a long time.
• He was expert in guerilla warfare.
• He proved his valour in the eras of Bajirao I and Nanasaheb Peshwa.
• He played a major role in establishing the supremacy of the Marathas in Malwa and Rajputana.
• He greatly helped Madhavrao Peshwa in re-establishing the Maratha supremacy after the defeat at Panipat.

Question 2.
Mahadji Shinde
Answer:

• Madhavrao Peshwa was conferred the title of Vakil-i-Mutlak by the Emperor. He was brave and an astute statesmen.
• After the Maratha defeat at Panipat, he played a major role in re-establishing the Maratha dominance and prestige in the Northern India.
• He realised that the guerilla tactics of Marathas would not be useful in the plains of the northern region.
• He trained his army under the French military expert de-Boigne and updated his artillery.
• With the help of his trained army, he subdued the Rohillas, Jats, Rajputs, Bundellas, etc.