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B.  State whether these statements are true or false:

               1.  Rainwater harvesting is an example of water conservation.

               2.  Recycle and refuse cannot be applied to water conservation.
               3.  Air is an example of exhaustible resource.

               4.  We need to conserve our natural resources to maintain environmental balance.

              Ans.  1. True  2. False  3. False  4. True

            C.  Fill in the blanks.

               1.                can be used as an alternate source of fuel.
               2.  Our body is made up of           of water.
               3.  Planting more trees on land with few or no trees is called    .
               4.  After the water evaporates from the soil, it leaves behind    .
              Ans.  1. CNG  2. 70%  3. afforestation  4. salt

                                              SECTION B (Subjective Type Questions)

            A.   Short answer type questions:

               1.   List the reasons for soil loss and its fertility.
              Ans.  •  Deforestation.
                  •  Use of chemical pesticides.
                  •  Overuse of land.
                  •   Making dams and doing mining activities.

               2.   Why is excess salt not good for soil?
              Ans.  It affects soil fertility and reduces the absorption of water by plants.

               3.   Name any four alternate sources of energy.
              Ans.  •  Wind Energy.
                  •   Geothermal Energy.
                  •   Solar Energy.
                  •   Nuclear Energy.
               4.   What is Clear Cutting method in controlled deforestation?
              Ans.  If the same types of trees are available over a large area, then trees of the same age group can be cut down in a selected
                  area and then marked for re-plantation.
               5.   How The United Nations Environment Programme (UNEP) has defined “Green Economy”?
              Ans.  The United Nations Environment Programme (UNEP) has defined the green economy as “one that results in improved
                  human well-being and social equity, while significantly reducing environmental risks and ecological scarcities. It is low
                  carbon, resource efficient, and socially inclusive”.
               6.   What are the sources of pollution?                                                        [NCERT]
              Ans.  Poisonous gases emitted from factories & vehicles, chemicals & garbage dumped in the waterbodies, excessive sound
                  of vehicles, etc. Noise pollution is caused due to the sound generated by Industrial and Constructional activities, factory
                  equipment, generators, electric saws, drills and other machineries.
               7.  Write any three actions which you can take to conserve energy.                             [NCERT]
              Ans.  a. Use alternative sources of energy.
                  b. Implement government policies in order to safeguard our natural resources.
                  c. Recycle and reuse elements and products.


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