Question Paper
Class / Subject: Class 7 (ICSE) · Geography
Chapter: Chapter 3 — Chapter 3: Composition of the Atmosphere
Time Allowed: 32 minutes
Max Marks: 16
1. What percentage of the atmosphere is nitrogen? [1]
(A) About 78%
(B) About 21%
(C) About 50%
(D) About 1%
2. What percentage of the atmosphere is oxygen? [1]
(A) About 21%
(B) About 78%
(C) About 50%
(D) About 1%
3. What gas is important for photosynthesis? [1]
(A) Carbon dioxide
(B) Nitrogen
(C) Argon
(D) Helium
4. What plays a role in cloud formation? [1]
(A) Water vapour
(B) Nitrogen
(C) Argon
(D) Helium
5. What does carbon dioxide help regulate? [1]
(A) Earth's temperature
(B) Only oxygen levels
(C) Only nitrogen levels
(D) Nothing important
6. What is an example of a gas in the remaining 1%? [1]
(A) Argon
(B) Nitrogen
(C) Oxygen
(D) Water
7. Can atmospheric composition vary? [1]
(A) Yes, with altitude and pollution
(B) No, it's always identical
(C) Only in space
(D) Never varies
8. Why is understanding atmospheric composition important? [1]
(A) It explains weather and climate processes
(B) No reason
(C) It's not useful
(D) Only for tests
9. What percentage of the atmosphere is nitrogen? [1]
(A) About 78%
(B) About 21%
(C) About 50%
(D) About 1%
10. What percentage of the atmosphere is oxygen? [1]
(A) About 21%
(B) About 78%
(C) About 50%
(D) About 1%
11. What gas is important for photosynthesis? [1]
(A) Carbon dioxide
(B) Nitrogen
(C) Argon
(D) Helium
12. What plays a role in cloud formation? [1]
(A) Water vapour
(B) Nitrogen
(C) Argon
(D) Helium
13. What does carbon dioxide help regulate? [1]
(A) Earth's temperature
(B) Only oxygen levels
(C) Only nitrogen levels
(D) Nothing important
14. What is an example of a gas in the remaining 1%? [1]
(A) Argon
(B) Nitrogen
(C) Oxygen
(D) Water
15. Can atmospheric composition vary? [1]
(A) Yes, with altitude and pollution
(B) No, it's always identical
(C) Only in space
(D) Never varies
16. Why is understanding atmospheric composition important? [1]
(A) It explains weather and climate processes
(B) No reason
(C) It's not useful
(D) Only for tests