Page 2 - 3 Home Assignment I(Obj &Subj)-Ozone layer Depletion
P. 2
(d) O3
Q.7 Among the following, choose the correct option which contains only 1
biodegradable items?
(i) Wood, paper, PVC
(ii) Paper, seeds, detergent,
(iii) Paper, animal excreta, wood
(iv) Wool, leaves, paper
(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (ii), (iii) and (iv)
(d) (iii) and (iv)
Q.8 Which of the following is biodegradable? 1
(a) Aluminium can
(b) Polythene bag
(c) Cow dung
(d) DDT
Q.9 Disposable plastic plates should not be used because -
(a) They are made of materials with light weight
(b) They are made of toxic materials
(c) They are made of biodegradable materials
(d) They are made of non-biodegradable materials
Q.10 Which of the following substances will not be converted to compost when 1
added in a composting pit?
(a) Waste paper
(b) Fruit and vegetable peels
(c) Human and animal excreta
(d) Plastic bags
Subjective
Q.1 Why is ozone layer getting depleted at the higher levels of the 1 E
atmosphere?
Q.2 Why are disposable cups being used in trains? 1 E
Q.3 (a) Why is damage to the ozone layer a cause for concern? 3 Av
(b) Suggest two ways that are being taken to limit this damage?
Q.4 (a) How are solid wastes disposed off? 3 Av
(b) Give any two ways in which non-biodegradable substances would
affect the environment?
Q.5 (a) If all the waste we generate is biodegradable, will this have no impact 3 D
on the environment?
