class 10 Assignment on OUR ENVIRONMENT.

1.What is meant by non-biodegradable waste?  Identify bio-degradable waste from the following:
empty packets of chips,plastic bottle, paper box of sweets,tin of cold drink.

2.Name the group of chemical compound which adversely affects the ozone layer.

3. In which form do the plants store the trapped solar energy?

4. WE do not clean pond or lakes but an aquarium needs to b cleaned. why?

5. Differentiate between food chain and food web.

6. The number of malarial patients in a village increased tremendously when large number of frogs were exported from the village. What could be the cause for this?


7. State any two practices which can help in the protection of our environment.

8.Describe any four modes of disposal of waste.

9. Calculate the amount of energy available to tiger in the following food chain if plants have 30000 J of energy available from the sun.

10. Why are green plants called producers?

11. Draw a line diagram to show the flow of solar energy in ecosystem.

12. LIst any two artificial ecosystems.

13. Why is govt stressing on use of jute or cloth bags?

14. In a colony, it was decided to remove a green park and construct an air conditioned shopping mall. Children of the colony took out a march against this decision with several placards to make the colony people aware of the importance of green plants. 

a. What are the ill effects of air conditioners? 
                              b. Design two placards which the children would have carried? 
c. Is the action taken by the children justified? 
                                   d. How does the ecosystem get affected when plants are removed?

 15 .  In a food chain comprising frogs, insects, birds and grass, which one of the organisms is likely to have maximum concentration of harmful non biodegradable chemicals in its body?