Chapter 11 Solutions — Nature's Treasures

Let Us Enhance Our Learning

1. 1.
   Fig. 11.9 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. Jumbled names: ocrk | refost | ndiw | atwre
2. 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.
3. 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
4. 4.
   Classify the following as renewable or non-renewable resources — coal, natural gas, forests and minerals.
5. 5.
   Why do we say that petroleum is a non-renewable resource?
6. 6.
   It is difficult to regrow forests. Justify this statement.
7. 7.
   Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
8. 8.
   List four activities that are possible due to the presence of air.
9. 9.
   How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
10. 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.
11. 11.
    Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?
12. 12.
    Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
13. 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?
14. 14.
    Fill up the blanks using the following terms — (fossil fuels, forest, air, petroleum, coal, water and non-renewable resource) Natural Resources → Renewable Resources → [blank], [blank], [blank] Natural Resources → [blank] → Natural gas → [blank] → [blank]
15. 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.
16. 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?