RBSE Class 6 Science Chapter 11 Question Answer Nature’s Treasures

By tackling these RBSE Class 6 Science Solutions and RBSE Class 6 Science Chapter 11 Nature’s Treasures Question Answer in English Medium, students will build a solid foundation in the topic.

Nature’s Treasures Class 6 Questions and Answers

RBSE Class 6 Science Chapter 11 Nature’s Treasures Question Answer

Nature’s Treasures Class 6 Question Answer – InText

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Question 1.
Surya, why do different types of vehicles go to different filling stations?
Answer:
The reason is that they use different types of fuels. For example, petrol and diesel.

RBSE Class 6th Science Chapter 11 Question Answer – Exercise

Let us enhance our learning

Question 1.
Fig. below shows items related to natural resources. Match them with their jumbled up names.
Make another table and write the names of these resources. Classify these resources as renewable or non-renewable.

Answer:

Jumbled up name	Actual Name	Renewable/ Non-renewable Resource
1. atwre	water	Renewable
2. ndiw	wind	Renewable
3. refost	forest	Renewable
4. ocrk	rock	Non-renewable

Question 2.
State whether the following statements are True [T] or False [F]. If False, correct them.
(i) Nature has all the resources to meet human needs.
(ii) Machines are a resource found in nature.
(iii) Natural gas is a non-renewable resource.
(iv) Air is a renewable resource.
Answer:
(i) True
(ii) False

Correct Statement—Machine is a man made resource.
(iii) True
(iv) True

Question 3.
Fill in the blanks using the most appropriate option—
(i) A fuel that is commonly used in two wheelers like scooters or bikes is …………
(a) Kerosene
(b) Petrol
(c) Diesel
(d) LPG
(ii) An example of a renewable resource is …………
(a) Coal
(b) Water
(c) Natural gas
(d) Petrol
Answer:
(i) (b)
(ii) (b)

Question 4.
Classify the following as renewable or non-renewable resources—coal, natural gas, forests and minerals.
Answer:
Renewable resources—forests
Non-renewable resources—coal, natural gas, minerals.

Question 5.
Why do we say that petroleum is a non-renewable resource?
Answer:
Petroleum is a type of fossil fuel which takes millions of years to form. They are found in limited quantities and once used, they get exhausted. They are not produced or replenished within a reasonable period of time. Therefore, petroleum is a non-renewable resource.

Question 6.
It is difficult to regrow forests. Justify this statement.
Answer:
It is difficult to regrow forests because trees take a long time to grow and the ecological structure of forests is complex. It is also very difficult and laborious to preserve a large number of trees at once for a long time.

Question 7.
Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
Answer:

Daily Activity	Natural Resource used	Ways to reduce their use
Use of paper	Wood (Forest)	Using digital documents Using recycled paper
Drinking water	Water	Using water efficient taps
Cooking food	Coal, natural gas (fossil fuel)	Using solar cookers
Use of electricity	Coal, natural gas (fossil fuel)	Obtaining electricity from solar panels Using energy efficient machines
Use of personal vehicle	Petroleum	Using public transport Using bicycles for short distances

Question 8.
List four activities that are possible due to the presence of air.
Answer:

1. Breathing
2. Lighting a fire
3. Flying kites
4. Photosynthesis in plants.

Question 9.
How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
Answer:
We will do the following to enhance the surroundings of our house with green cover—

1. Ensure protection of existing trees and green spaces.
2. Participate in community tree plantation programmes.
3. Plant trees in local parks and open spaces.
4. Support local schools for green initiatives.
5. Inspire neighbours to plant trees in their homes, balconies and surroundings.

Question 10.
In the given illustration, we see that food is being cooked.

Answer the following questions—
(i) What type of energy is being used for cooking?
(ii) Name one benefit and one drawback of using this type of energy for cooking.
Answer:
(i) Solar energy
(ii) Advantage—The use of this energy does not cause any kind of pollution.
Disadvantage—The use of this energy is limited during night time.

Question 11.
Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?
Answer:
The leaves that fall from the trees decay and enrich the soil with nutrients. This soil is used by new plants and trees to grow. But cutting trees on a large scale will reduce this process which reduces the recycling of nutrients in the soil, which reduces the quality of the soil.

Question 12.
Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
Answer:
Human activities that cause air pollution :

1. By using fossil fuels in vehicles and industries
2. By cutting down forests

Suggestion for reducing air pollution—Use of public transport and electric vehicles should be encouraged.

Question 13.
A family uses solar panels to generate electricity, a gas stove to cook food and a windmill for pumping water from a well. What would happen if there were no sunlight for a week?
Answer:

1. If there is no sunlight for a week then there will be no electricity production from the solar panel which will lead to a shortage of electricity.
2. Cooking food with a gas stove will not be affected because natural gas is used for this, not sunlight.
3. The process of drawing water from the well by a windmill will also remain unaffected because wind is required to run the windmill and not sunlight.

Question 14.
Fill up the blanks using the following terms—
(fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)

Answer:

Question 15.
There is an increasing demand of trees to meet the requirements of industries and for housing. Therefore, trees are being felled. Is it justified? Discuss and prepare a brief report.
Answer:
Continuous felling of trees to meet the needs of industries and housing is not appropriate. To solve this, trees should be planted and forests should be protected. Also, alternative sources should be developed to meet these needs.

Brief report—The following points can be included in it—

1. Importance of forests
2. Effect of forests on the environment
3. Measures to conserve forests
4. Alternative sources.

Question 16.
Propose a plan to use less water in your school. What steps would you take to make this plan happen and how would it help the environment?
Answer:
Plan to reduce water usage in school—

1. For this, we will fix water leakage at all places in the school.
2. We will run awareness campaigns to prevent unnecessary use of water and conserve it.
3. We will try to harvest rainwater.

By preventing wastage of water, conserv ing and storing it, the groundwater level can be prevented from decreasing, which will help in protecting the environment.

RBSE Class 6 Science Chapter 11 Important Questions

Multiple Choice Questions

1. Which of the following is present in air?
(a) Nitrogen
(b) Oxygen
(c) Argon
(d) All of these
Answer:
(d) All of these

2. Toorji Ka Jhalra Bawadi is situated in—
(a) Rajasthan
(b) Gujarat
(c) Madhya Pradesh
(d) Uttar Pradesh
Answer:
(a) Rajasthan

3. When is World Water Day celebrated—
(a) 24 April
(b) 22 March
(c) 1 December
(d) 5 June
Answer:
(b) 22 March

4. The main source of energy on earth is—
(a) Forest
(b) Air
(c) Sun
(d) Water
Answer:
(c) Sun

5. In which month is Van Mahotsav celebrated all over the country?
(a) March
(b) July
(c) August
(d) December
Answer:
(b) July

6. Which of the following is used for making bricks?
(a) Granite
(b) Sandstone
(c) Marble
(d) Laterite
Answer:
(d) Laterite

7. The mineral used in making normal mobile phones is—
(a) Silver
(b) Copper
(c) Cobalt
(d) All of these
Answer:
(d) All of these

8. Which of the following is not a natural resource?
(a) Solar energy
(b) Solar panel
(c) Soil
(d) Forest
Answer:
(b) Solar panel

9. Non-renewable resource is—
(a) Air
(b) Water
(c) Soil
(d) Forest
Answer:
(c) Soil

10. Required for the survival of the living things—
(a) Nitrogen
(b) Argon
(c) Carbon-dioxide
(d) Oxygen
Answer:
(d) Oxygen

Fill in the blanks

1. Moving air is called …………………….. .
Answer:
wind

2. The solar panels capture the …………………….. and produce electricity.
Answer:
Sun’s energy

3. The air which surrounds the Earth is a mixture of …………………….. .
Answer:
gases

4. These resources which we get from nature are called …………………….. resources.
Answer:
natural

5. …………………….. covers about two-thirds of the Earth’s surface.
Answer:
Water

6. Sunlight helps plants prepare …………………….. .
Answer:
food.

True/False

1. The working of a windmill and a spinning top is the same. (True/False)
Answer:
True

2. The water found in oceans and seas is soft. (True/False)
Answer:
False

3. Petrol, diesel and kerosene are obtained from petroleum. (True/False)
Answer:
True

4. Electric vehicles do not emit any kind of smoke. (True/False)
Answer:
True

Match the words given in Column-I with Column-II

Question 1.

Column-I	Column-II
1. Air	(a) Diesel
2. Petroleum	(b) Snow
3. Mineral	(c) Aluminium
4. Water	(d) Wind

Answer:

Column-I	Column-II
1. Air	(d) Wind
2. Petroleum	(a) Diesel
3. Mineral	(c) Aluminium
4. Water	(b) Snow

Question 2.

Column-I	Column-II
1. Air	(a) Natural gas
2. Sun	(b) Mineral
3. Fossil fuel	(c) Solar panel
4. Granite	(d) Windmill

Answer:

Column-I	Column-II
1. Air	(d) Windmill
2. Sun	(c) Solar panel
3. Fossil fuel	(a) Natural gas
4. Granite	(b) Mineral

Very Short Answer Type Questions

Question 1.
Why do we need natural resources?
Answer:
We need natural resources for survival and to make our life more comfortable.

Question 2.
What is the composition of the air present around the earth?
Answer:
The air present around the earth is a mixture of various gases which contain nitrogen (78%), oxygen (21%), argon, carbon dioxide and other gases (1%).

Question 3.
What is the meaning of wind?
Answer:
Moving air is called wind.

Question 4.
For which activities do we need water in our daily life?
Answer:
Water is needed for drinking, cooking, bathing, washing clothes, cleaning, grow ing crops and industrial work.

Question 5.
Why is the water of oceans and seas not suitable for use?
Answer:
The water of oceans and seas is salty, hence this water is not suitable for domestic, agricultural and industrial use.

Question 6.
Suggest some measures to reduce water loss.
Answer:
There are many methods to reduce water loss. Switching off the tap when not in use and repairing water leakage, recycling of water and water harvesting are also helpful in saving water.

Question 7.
Why do many families in India offer water to the Sun early in the morning?
Answer:
Many families in India offer water to the Sun early in the morning to express gratitude towards the Sun.

Question 8.
What is Nellikai?
Answer:
Amla is called Nellikai in Kannada.

Question 9.
Why should we wash our hands thoroughly after touching soil from different places?
Answer:
Sometimes the soil which contains garbage contains germs which can be harmful to us. so we should wash our hands thoroughly after touching soil from different places.

Question 10.
Why is soil a priceless asset?
Answer:
Soil is a valuable asset because it supports biodiversity.

Question 11.
How is soil formed?
Answer:
Soil is formed over a long period of time (thousands of years) by the disintegration of rocks by the sun, water and living organisms.

Question 12.
What are rocks made of?
Answer:
Rocks are made of minerals.

Question 13.
Which important metals are obtained from mining?
Answer:
Important metals like aluminium, gold, copper and iron are obtained from minerals.

Question 14.
Most of the vehicles we use for transportation use which fuel?
Answer:
Fossil fuel.

Question 15.
What is obtained from petroleum?
Answer:
Petrol, diesel and kerosene are obtained from petroleum.

Question 16.
Write the full form of CNG and LPG?
Answer:
CNG = Compressed Natural Gas, LPG = Liquefied Petroleum Gas.

Question 17.
Give tw o ways of how w e can contribute towards the conservation of fossil fuels?
Answer:
(i) By walking or cycling to nearby places,
(ii) By using public transport.

Question 18.
What are renewable resources?
Answer:
Resources which get renewed, replenished or restored within a reasonable period of time are called renewable resources.

Question 19.
What is meant by ‘forest’?
Answer:
Forests arc large areas with dense growth of different types of plants.

Question 20.
Give an example of recycling in nature.
Answer:
Plants get nutrients from the soil. The leaves that fall from the trees decay and enrich the soil with nutrients. This soil is used by new plants and trees to grow. This is an example of recycling in nature.

Question 21.
Which major minerals are used in mobile phone manufacturing?
Answer:
In mobile phone manufacturing – Gold, silver, copper, cobalt etc. are used.

Short Answer Type Questions

Question 1.
Why do we become uncomfortable when we hold our breath?
Answer:
It is difficult to hold our breath for a long time because the air inhaled through breath contains oxygen. Our body needs it to function. When we hold our breath for a long time, the body does not get enough oxygen. That is why we become uncomfortable.

Question 2.
What is meant by windmill? Tell its use.
Answer:
Windmill is like a spinning wheel of large wings, whose blades are moved by the wind. Windmills can be used to run flour mills, to pull up water from a well, or to generate electricity.

Question 3.
What are windmill farms? Tell the names of the major windmill farms of India.
Answer:
A windmill farm is an area that has a large number of windmills which use the energy of the w ind to generate electricity.

Major w indmill farms of India—(1) Muppanda! Wind Farm in Tamil Nadu, (2) Jaisalmer Wind Park in Rajasthan and (3) Brahmanvel Wind Farm in Maharashtra.

Question 4.
How does water get polluted? What is its effect?
Answer:
We pollute soft water sources by throw ing garbage (waste material) in them. When waste from homes and industries meets water sources, they pollute water. Its effect is that polluted water is not suitable for the use of living beings.

Question 5.
Give three examples of the use of solar energy.
Answer:

1. Solar panels collect solar energy and produce electricity.
2. Energy obtained from the sun is used to cook food in a solar cooker.
3. Solar energy can also be used to heat water in a solar water heater.

Question 6.
“We all depend on the main source of energy.” Clarify this statement.
Answer:
Life on earth cannot be imagined without the Sun. The Sun is the main source of energy on the Earth. Plants get energy from the Sun and produce food. Animals eat plants and grow. We get food from both plants and animals. This cycle on Earth is possible due to the Sun. So we all are dependent on the Sun as the main source of energy.

Question 7.
Why should we conserve and use forests responsibly?
Answer:
Forests are a natural home for many wild animals, including birds and insects. Forests provide food and shelter to them. In nature, every animals depend on other life forms for survival. The diversity of life forms ensures food for every living being. However, over the years, the forest cover has been decreasing, mainly due to human activities like large scale cutting of trees. It takes many years to grow a new forest or restore lost forests. Therefore, we must preserve and use forests responsibly so that they get enough time to regenerate.

Question 8.
What is ‘Van Mahotsav’? Explain its purpose.
Answer:
Van Mahotsav is a week-long event celebrated across the country during the month of July. It is a forest festival during which new plants and trees are planted, and awareness about respecting forests is raised. The aim of the event is to increase the green cover.

Question 9.
Which major minerals are obtained from rocks? What are their uses?
Answer:
Important metals, such as aluminium, gold, copper and iron are extracted from minerals. Minerals are used in the manufacturing of airplanes, cars, jewellery, cosmetics, electrical and electronic equipment.

Question 10.
Name the traditional domestic fuels. Which fuels are now replacing them?
Answer:
Earlier, coal, wood and cow dung cakes were used as traditional domestic fuels for cooking. Natural gas which reduces pollution and refined petroleum gas (LPG) are gradually replacing them.

Question 11.
Differentiate between natural resources and man-made resources.
Answer:

Natural Resources	Man-made Resources
The resources which we get from nature are called natural resources. They are formed from natural factors. Example: Air, water, forest, soil, solar energy, rocks, minerals, fossil fuels etc.	The resources which are created by humans are called man-made resources. They are made from materials obtained from natural resources. Example: Electric bulb, furniture, solar panel, bicycle etc.

Question 12.
Differentiate between renewable and non-renewable resources.
Answer:

Renewable Resources	Non-renewable Resources
Those resources which are renewed, replenished or restored within a reasonable time period are called renewable resources. Example: Air, water and forest.	They are not produced or replenished within a reasonable period of time. These resources are called non- renewable resources. Example: Minerals, soil, soft materials, petroleum natural gas.

Question 13.
Why should we conserve natural resources?
Answer:
We get these resources from nature and also make things using them for our consumption. Therefore, we must conserve our natural resources and use them responsibly without wasting them. This way, we can continue to fulfill our present needs while also saving for the future, without harming the environment.

Question 14.
What is Chipko movement? Explain.
Answer:
From ancient times, India had a tradition of respecting, protecting and preserving forests. Many efforts have been made by common people to prevent the cutting of trees, and thus, saving forests. One such effort is the famous— Chipko movement. It started in the early’ 1970s in Uttarakhand. Local women actively participated in this movement. They encircled and hugged the trees to protect them from being felled.

Long Answer Type Questions

Question 1.
Where do we get water from? What is the source of water?
Answer:
Water covers about two-thirds of the Earth’s surface. Most of the water is found in oceans and seas. However, this water is saline or salty. This saline water is not fit for domestic, agricultural and industrial use. For all these activities, we need freshwater, which is present in the form of ice sheets or snow, rivers or lakes on the surface of the Earth, and underground. Freshwater present in ice sheets and snow, or underground water, is difficult to access. A very small fraction of the freshwater present in ponds, rivers, lakes and wells is easily accessible.

Question 2.
Why is it necessary to find alternative sources of fossil fuels?
Answer:
Fossil fuels are found in limited quantities. Hence, we will soon run out of fossil fuels if we continue to use them in the manner that we currently do. To avoid such a situation, we need to explore alternate sources of energy. When fossil fuels are burnt, smoke and carbon dioxide gas are produced which pollutes the air. Over-dependence on fossil fuels for transportation and as domestic fuels has resulted in large scale air pollution. To avoid such a situation, we have to find alternative sources of energy.

Question 3.
Explain non-renewable resources giving examples.
Answer:
Fossil fuels take millions of years to form. They are found in limited quantities and once used, they get exhausted. They are not produced or replenished within a reasonable period of time. These resources are called non-renewable resources. Examples of non-renewable natural resources are minerals, soil, rocks, coal, petroleum and natural gas.

Essay Type Questions

Question 1.
What is meant by ‘rain water harvesting’? Tell us about its tradition in India.
Answer:
Water harvesting is one of the methods for conserving water. In many buildings, rainwater is collected and stored in large quantities for later use. This is called rainwater harvesting.

This is an age-old practice in India. For example, stepwells commonly known as Bawadi in Rajasthan and Vav in Gujarat are built for water harvesting as a response to the scarcity of water in these regions. These stepwells have a unique system of water harvesting. They store not only rainwater but also water seeping from nearby lakes, ponds and rivers. The walls of the trenches (long deep holes dug in the ground) are lined with blocks of stones that allow seepage of water.

Question 2.
How do rocks play an important role in human life and why is their conservation necessary?
Answer:
Rocks are used in the construction of houses, buildings, temples, roads, dams and table tops. Some rocks, like slate, are used for roofing and laterite can be used as a building material, like bricks. Some of the important rocks are granite, sandstone and marble.

Minerals are obtained from rocks. Minerals are used in the manufacture of aircraft, cars, jewellery, cosmetics, electrical appliances and electronic equipment. Thus rocks play an important role in human life.

Rocks play a vital role in our lives. It takes thousands to millions of years to form rocks. Therefore, it is important to conserve and use them responsibly.

Question 3.
What is fossil fuel? Explain its use.
Answer:
Petroleum along with natural gas and coal are commonly called fossil fuels. They are formed essentially from the remains of microorganisms and plants that got buried deep inside the earth, and were converted to petroleum, natural gas and coal. It takes millions of years for these fuels to form.

Use of fossil fuels :
1. Petroleum— Petrol, diesel and kerosene are obtained from petroleum. Petrol and diesel are the two most commonly used fuels for vehicles.

2. Natural gas— It is used for cooking food and electricity production. Nowadays it is used as fuel in vehicles in the form of compressed natural gas (CNG). It is a cleaner fuel than petrol or diesel.

3. Coal— It was earlier used as fuel for cooking food. Now coal is mainly used for electricity production.

Question 4.
What is meant by natural resources? How are they classified?
Answer:
The resources that we get from nature are called natural resources. Air, water, solar energy, forest, soil, rocks, minerals and fossil fuels arc all major natural resources that are obtained from nature. Over time, many of these natural resources are recharged by natural processes. On this basis, natural resources can be classified into tw o categories :
(1) Renewable resources— Resources that are renewed, replenished or restored within a reasonable period of time are called renew able resources. Air, water and forests are some examples of renewable natural resources. Nature renews them.

(2) Non-renewable resources— Fossil fuels take millions of years to form. They are found in limited quantities and once used, they get exhausted. They are not produced or replenished within a reasonable period of time. These resources are called non-renewable resources. Examples of non-renewable natural resources are minerals, soil, rocks, coal, petroleum and natural gas.

RBSE Class 6 Science Chapter 11 Notes

Class 6 Science Chapter 11 Notes RBSE – Nature’s Treasures Class 6 Notes

1. Resources required for our survival are provided by nature.
2. Resources provided by nature are called natural resources. Some important natural resources are air, water. energy from the Sun. forests. soil. rocks, minerals and fossil fuels.
3. The air which surrounds the Earth is a mixture of gases which are nitrogen, oxygen, argon, carbon dioxide and other gases in small quantities.
4. Water covers about tw0-thirds of the Earth’s surface. Most of the water is found in oceans and seas.
5. Sunlight helps plants prepare food. The Sun also provides all the living beings on Earth with heat and light. It is their main source of energy.
6. Forests are large areas dense growth of various types of plants.
7. Soil is formed by the disintegration (breaking apart) of rocks by actions of the Sun, water and living organisms over a long time (thousands of years). Soil is a precious treasure tlut supports biodiversity.
8. Rocks are made up of minerals, from which many important metals are obtained.
9. Natural gas, coal and petroleum are called fossil fuels.
10. Resources created by human beings to meet their needs are called human-made resources.
11. Natural resources can be classified as renewable resources and non-renewable resources.
12. Resources that get renewed, replenished or restored by natural processes within a reasonable period are called renewable resources.
    Example : Water, air and forest.
13. Resources that are in limited quantities and do not get replenished within a reasonable period are called non-renewable resources.
    Example : Mineral, soil, coal, petroleum, etc.
14. All living beings, including humans, depend on natural resources for their survival so we should use them judiciously.