Class 6 Science Chapter 12 Natural Resources

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Class 6 Science Chapter 12 Natural Resources

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Natural Resources

Chapter: 12

PART – II

EXERCISE

1. Some pictures of natural resources are given below. In the right side of the list two options of Renewable and Non-renewable natural resources are given. Match the pictures of the items given in left side boxes in pictures with appropriate option given in the right side boxes.

Ans: 

2. Darken the circle of correct answer

(i) The resources which cannot be recreated after use are called ______.

(a) Human resource.

(b) Non-renewable resource.

(c) Renewable resource.

(d) Inorganic resource.

Ans: (b) Non-renewable resource.

(ii) The dry surface of the earth is called ______.

(a) Stone.

(b) Soil.

(c) Water.

(d) Air.

Ans: (b) Soil.

(iii) In which date of the year World Water Day is celebrated?

(a) 22nd April.

(b) 22nd March.

(c) 5th June.

(d) 21st March.

Ans: (b) 22nd March.

(iv) The thin layer of air that extends several kilometers above the surface of earth is called _______.

(a) Hydrosphere.

(b) Atmosphere.

(c) The firmament.

(d) None of the above.

Ans: (b) Atmosphere.

3. Answer in one word.

(a) What percentages of oxygen is there in the atmosphere? 

Ans: 21%.

(b) Write the name of an aquatic plant.

Ans: Water Hyacinth.

(c) Write the name of an aquatic animal.

Ans: Fish.

(d) What is the main source of power?

Ans: Sun.

4. Identify the correct and incorrect statements –

(a) Forest is natural resource.

Ans: Correct.

(b) Stone is renewable resource.

Ans: Incorrect.

(c) Pond is non-renewable resource.

Ans: Incorrect.

(d) The most commonly used fuel in vehicles is Kerosene.

Ans: Incorrect.

(e) The highest amount of gas found in atmosphere is oxygen.

Ans: Incorrect.

5.Give a brief  answer-

(a) What are natural resources?

Ans: Natural resources are the materials and substances found in nature that are useful to living beings, such as air, water, soil, sunlight, minerals, and forests.

(b) How many types of natural resources are there and what are these?

Ans: Natural resources are of two types:

(i) Renewable resources (e.g. sunlight, water, air).

(ii) Non-renewable resources (e.g. coal, petroleum, minerals).

(c) What is renewable natural resource and what is non renewable natural resource?

Ans: Renewable resources are those that are naturally replenished, like air, water, sunlight.

Non-renewable resources are those that cannot be replaced once used, like coal and petroleum.

(d) Why the sun is called the main source of energy?

Ans: The sun provides light and heat to the Earth. It helps plants to make food, supports life, and enables processes like the water cycle and photosynthesis.

(e) Why we should conserve rainwater?

Ans: Rainwater is a natural and clean source of water. Conserving it helps to recharge groundwater, reduce water scarcity, and meet household and agricultural needs.

6. Why should we use alternative energy?

Ans: We should use alternative energy like solar and wind energy because fossil fuels are limited and pollute the environment. 

7. What type of energy we find from sunlight?

Ans: We get solar energy from sunlight, which can be used for heating, cooking, drying, and generating electricity.

8. What is windmill? What is used in the windmill?

Ans: A windmill is a device that uses wind energy to rotate blades, which in turn generate electricity using a turbine.

9. What are the two functions where air is used?

Ans: The two functions where air is used are: 

(i) Breathing by humans and animals (oxygen).

(ii) Generating wind energy through windmills.

10. Give an example from where you can understand that wind is a power.

Ans: A paper wheel spins faster when we run with it this shows that moving air (wind) has power.

11. You know that if we keep a pot full of water outside under sun-shine it will be hot. What other things you can do by using the heat from the sum? 

Ans: If we keep a pot full of water outside under sunshine, it becomes hot because of the sun’s heat. 

Other things we can do by using the heat from the sun are:

(i) Dry clothes by hanging them under sunlight.

(ii) Dry food grains, fruits, and vegetables for preservation.

(iii) Use solar cookers to cook food using the sun’s heat.

(iv) Heat water for bathing or other uses.

(v) Generate electricity using solar panels that absorb sunlight.

12. Why petrol, diesel etc. are considered as non-renewable natural resource? 

Ans: Petrol, diesel, and similar fuels are considered non-renewable natural resources because they take millions of years to form from the remains of dead plants and animals buried under the earth. Once we use these fuels, they cannot be replaced within a human lifetime.

13. What can you do at your home to conserve non renewable resources?

Ans: (i) Switch off lights/fans when not needed.

(ii) Use bicycles or walk.

(iii) Use LPG efficiently.

(iv) Avoid wastage of fuel.

14. Although most of the earth’s surface is covered with water, the amount of usable water is very negligible. So how you can make your friends aware to prevent wastage of water?

Ans: (i) By explaining the importance of water.

(ii) Encouraging to turn off taps when not in use.

(iii) Promoting rainwater harvesting.

(iv) Organizing awareness campaigns at school.

15. Presently Government has initiated various programmes in the field of plantation. Do you plant trees at any other time besides the government’s programme in your school? If yes, in what occasion you plant the trees?

Ans: Yes, besides government programs, we also plant trees on special occasions like birthdays, festivals, and school events. These moments provide a meaningful opportunity to contribute to the environment, celebrate life, and encourage others to join in protecting nature.

16. Name an action or observation day taken up by the government in the field of conservation of natural resources.

Ans: One important day dedicated to the conservation of natural resources is World Environment Day, which is celebrated every year on 5th June. On this day, people around the world come together to raise awareness about protecting the environment, conserving natural resources, and promoting sustainable living for a healthier planet.

17. In present time temperature in the world is increasing day by day. What steps can you take together with your friends to reduce temperature?

Ans: (i) Plant more trees.

(ii) Avoid burning plastic or waste.

(iii) Promote use of clean energy.

(iv) Save electricity.

18. What ideas you would like to transmit to ensure that water is not misused at your home? How will you make the members of your house aware towards this.

Ans: (i) Fix leaking taps.

(ii) Use buckets instead of showers.

(iii) Reuse water when possible.

(iv) Educate family about saving water.