Question Paper
Class / Subject: Class 7 (ICSE) · Science
Chapter: Chapter 14 — Chapter 14: Air and the Atmosphere
Time Allowed: 32 minutes
Max Marks: 16
1. What is air mainly composed of? [1]
(A) Nitrogen and oxygen
(B) Only carbon dioxide
(C) Only argon
(D) Only water vapour
2. What percentage of air is nitrogen? [1]
(A) 78%
(B) 21%
(C) 1%
(D) 50%
3. What percentage of air is oxygen? [1]
(A) 21%
(B) 78%
(C) 1%
(D) 50%
4. Where does weather occur? [1]
(A) The troposphere
(B) The stratosphere
(C) Outer space
(D) Underground
5. Where is the ozone layer located? [1]
(A) The stratosphere
(B) The troposphere
(C) Outer space
(D) Underground
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 can harm air quality? [1]
(A) Pollution from vehicles and factories
(B) Clean rainfall
(C) Trees
(D) Fresh oxygen
8. Why is understanding air and atmosphere important? [1]
(A) It's essential for life and weather
(B) No reason
(C) It's not important
(D) Only for tests
9. What is air mainly composed of? [1]
(A) Nitrogen and oxygen
(B) Only carbon dioxide
(C) Only argon
(D) Only water vapour
10. What percentage of air is nitrogen? [1]
(A) 78%
(B) 21%
(C) 1%
(D) 50%
11. What percentage of air is oxygen? [1]
(A) 21%
(B) 78%
(C) 1%
(D) 50%
12. Where does weather occur? [1]
(A) The troposphere
(B) The stratosphere
(C) Outer space
(D) Underground
13. Where is the ozone layer located? [1]
(A) The stratosphere
(B) The troposphere
(C) Outer space
(D) Underground
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 can harm air quality? [1]
(A) Pollution from vehicles and factories
(B) Clean rainfall
(C) Trees
(D) Fresh oxygen
16. Why is understanding air and atmosphere important? [1]
(A) It's essential for life and weather
(B) No reason
(C) It's not important
(D) Only for tests