Question

The activities of man had adverse effects on all forms of living organisms in the

biosphere. Unlimited exploitation of nature by man disturbed the delicate ecological

balance between the living and non-living components of the biosphere. The unfavorable

conditions created by man himself threatened the survival not only of himself but also the

entire living organisms on the mother earth. One of your classmates is an active member

of 'Eco-club of your school which is creating environmental awareness amongst the

school students, spreading the same in the society and also working hard for preventing

environmental degradation of the surroundings.

a) It is necessary to conserve our environment. Which of these is the reason to conserve

our environment?

(i) To save water, air and soil from pollution.

(ii) To maintain ecological balance.

(iii) To save ozone layer.

(iv) All of these.

b) The green and blue dustbin signifies
(i) Biodegradable waste and non biodegradable waste respectively.

(ii) Non-biodegradable waste and biodegradable waste respectively.

(iii) Eco friendly waste

(iv)Domestic waste only.

c) Why are plastics difficult to recycle?

(i) Because it is very hard material

(ii) Because of the different sizes of plastic.

(iii) Because it is very aggressive in nature

(iv) Because of different types of polymer resins

d)In the following groups of materials, which group (s ) contains only non

biodegradable items

(i) wood, paper, leather

(ii)polythene, detergent, PVC

(iii) plastic , detergent, grass

(iv) plastic , bakelite, DDT

e) Which of these non biodegradable wastes generated daily in kitchen can be recycled?

(i) Polythene bags

(ii) Plastic containers

(iii)Vegetable waste

(iv) Both i and ii​

Answer 1

a) (iv) all of these

b) (I) biodegradable and non biodegradable waste respectively

c) (iv) bhut bda h m nhi likh rhi

d) (iv)

e) (iv)