Question Paper
Class / Subject: Class 9 (ICSE) · Geography
Chapter: Chapter 9 — Chapter 9: The Atmosphere - Composition and Structure
Time Allowed: 32 minutes
Max Marks: 16
1. What is the atmosphere mainly composed of? [1]
(A) Nitrogen and oxygen
(B) Only carbon dioxide
(C) Only argon
(D) Only water vapour
2. What percentage is nitrogen? [1]
(A) 78%
(B) 21%
(C) 1%
(D) 50%
3. What percentage is oxygen? [1]
(A) 21%
(B) 78%
(C) 1%
(D) 50%
4. Where does weather occur? [1]
(A) The troposphere
(B) The stratosphere
(C) The mesosphere
(D) The thermosphere
5. What layer contains the ozone layer? [1]
(A) The stratosphere
(B) The troposphere
(C) The mesosphere
(D) The thermosphere
6. What does the ozone layer absorb? [1]
(A) Harmful ultraviolet radiation
(B) Only visible light
(C) Only sound waves
(D) Nothing useful
7. What happens to air density at higher layers? [1]
(A) It decreases
(B) It increases
(C) It stays the same
(D) It becomes solid
8. Why study the atmosphere's structure? [1]
(A) To understand weather, protection and space phenomena
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is the atmosphere mainly composed of? [1]
(A) Nitrogen and oxygen
(B) Only carbon dioxide
(C) Only argon
(D) Only water vapour
10. What percentage is nitrogen? [1]
(A) 78%
(B) 21%
(C) 1%
(D) 50%
11. What percentage is oxygen? [1]
(A) 21%
(B) 78%
(C) 1%
(D) 50%
12. Where does weather occur? [1]
(A) The troposphere
(B) The stratosphere
(C) The mesosphere
(D) The thermosphere
13. What layer contains the ozone layer? [1]
(A) The stratosphere
(B) The troposphere
(C) The mesosphere
(D) The thermosphere
14. What does the ozone layer absorb? [1]
(A) Harmful ultraviolet radiation
(B) Only visible light
(C) Only sound waves
(D) Nothing useful
15. What happens to air density at higher layers? [1]
(A) It decreases
(B) It increases
(C) It stays the same
(D) It becomes solid
16. Why study the atmosphere's structure? [1]
(A) To understand weather, protection and space phenomena
(B) No reason
(C) It's not useful
(D) Only for tests