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SAI International School
Subject - Chemistry
Class - VIII
Topic – Pollution of Air and water
Sub-topic-Green house effect and global warming; Steps to reduce
air pollution

HOME ASSIGNMENT

OBJECTIVE/MCQs:-

1. Which of these does not cause global warming?
a. Oxygen.
b. Carbon dioxide.
c. Methane.
d. CFC.
2. A greenhouse gas made up of glass help for
a. For the growth of plants.
b. To prevent global warming.
c. To prevent drought.
d. To prevent a flood.
3. Which of these is not a greenhouse gas?
a. Carbon dioxide.
b. Oxygen.
c. Ozone.
d. Water vapour.
4. Which of these do not cause the greenhouse effect?
a. Using manures.
b. Landfilling.
c. Deforestation.
d. Using fertilisers
5. Which of these is not the effect of global warming?
a. Increase in sea level.
b. Melting of glaciers.
c. Floods.
d. Purification of air.

SUBJECTIVE:-

Q. No. Questions Skill Marks
1. Which gas which is mainly responsible for global warming? U 1
2. Can oxygean be considered as a green house gas? U 1

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