Question Paper
Class / Subject: Class 6 (ICSE) · Science
Chapter: Chapter 12 — Chapter 12: Air and the Atmosphere
Time Allowed: 32 minutes
Max Marks: 16
1. What is air mostly made of? [1]
(A) Nitrogen and oxygen
(B) Only oxygen
(C) Only carbon dioxide
(D) Only hydrogen
2. What percentage of air is nitrogen? [1]
(A) About 78%
(B) About 21%
(C) About 50%
(D) About 100%
3. What percentage of air is oxygen? [1]
(A) About 21%
(B) About 78%
(C) About 50%
(D) About 100%
4. What is the layer closest to Earth called? [1]
(A) The troposphere
(B) The stratosphere
(C) The mesosphere
(D) The exosphere
5. Where does weather occur? [1]
(A) The troposphere
(B) The stratosphere
(C) Outer space
(D) Underground
6. What does the atmosphere protect us from? [1]
(A) Harmful radiation from the Sun
(B) Nothing
(C) Only rain
(D) Only wind
7. What can cause air pollution? [1]
(A) Vehicle emissions and industrial waste
(B) Only clean air
(C) Only rain
(D) Only trees
8. Why is the atmosphere important? [1]
(A) Essential for breathing and protecting life
(B) It has no importance
(C) Only for decoration
(D) Only for looks
9. What is air mostly made of? [1]
(A) Nitrogen and oxygen
(B) Only oxygen
(C) Only carbon dioxide
(D) Only hydrogen
10. What percentage of air is nitrogen? [1]
(A) About 78%
(B) About 21%
(C) About 50%
(D) About 100%
11. What percentage of air is oxygen? [1]
(A) About 21%
(B) About 78%
(C) About 50%
(D) About 100%
12. What is the layer closest to Earth called? [1]
(A) The troposphere
(B) The stratosphere
(C) The mesosphere
(D) The exosphere
13. Where does weather occur? [1]
(A) The troposphere
(B) The stratosphere
(C) Outer space
(D) Underground
14. What does the atmosphere protect us from? [1]
(A) Harmful radiation from the Sun
(B) Nothing
(C) Only rain
(D) Only wind
15. What can cause air pollution? [1]
(A) Vehicle emissions and industrial waste
(B) Only clean air
(C) Only rain
(D) Only trees
16. Why is the atmosphere important? [1]
(A) Essential for breathing and protecting life
(B) It has no importance
(C) Only for decoration
(D) Only for looks