Page 2 - 4.Home Assignment II (Worksheet)-Ozone layer Depletion

Q.7 (a) (i) In the following food chain, 100 J of energy is available to the lion. How
much energy was available to the producer?

Plants Deer Lion
(ii) In the following food chain, plants provide 500 J of energy to rats. How
much energy will be available to hawks from snakes?

Plants Rats Snakes Hawks
(b) Suggest three ways to maintain a balance between environment and
development to survive.

Q.8 (a) What is biological magnification?
(b) Name some food materials which show this effect?
(c) What is the source of these pesticides in the food items?

Q.9 What are the three propositions given for transfer of energy in an ecosystem?

Q.10 Describe, how decomposers facilitate recycling of matter in order to maintain
balance in the ecosystem.