Question Paper
Class / Subject: Class 4 (SSC) · EVS भाग 1 - विज्ञान (परिसर अभ्यास)
Chapter: Chapter 9 — Chapter 9: Air
Time Allowed: 32 minutes
Max Marks: 16
1. What is air mainly made of? [1]
(A) Nitrogen and oxygen
(B) Only oxygen
(C) Only nitrogen
(D) Only carbon dioxide
2. What percentage of air is oxygen approximately? [1]
(A) 21%
(B) 78%
(C) 50%
(D) 100%
3. What percentage of air is nitrogen approximately? [1]
(A) 78%
(B) 21%
(C) 50%
(D) 10%
4. What do living things need from air? [1]
(A) Oxygen
(B) Only nitrogen
(C) Only carbon dioxide
(D) Nothing
5. What do plants use from air? [1]
(A) Carbon dioxide
(B) Only nitrogen
(C) Only oxygen
(D) Nothing
6. What do we feel as moving air? [1]
(A) Wind
(B) Rain
(C) Sunlight
(D) Heat only
7. What can pollute the air? [1]
(A) Smoke and vehicle emissions
(B) Fresh flowers
(C) Clean water
(D) Green trees
8. Why is clean air important? [1]
(A) For our health and the environment
(B) It's not important
(C) No reason
(D) Only for looks
9. What is air mainly made of? [1]
(A) Nitrogen and oxygen
(B) Only oxygen
(C) Only nitrogen
(D) Only carbon dioxide
10. What percentage of air is oxygen approximately? [1]
(A) 21%
(B) 78%
(C) 50%
(D) 100%
11. What percentage of air is nitrogen approximately? [1]
(A) 78%
(B) 21%
(C) 50%
(D) 10%
12. What do living things need from air? [1]
(A) Oxygen
(B) Only nitrogen
(C) Only carbon dioxide
(D) Nothing
13. What do plants use from air? [1]
(A) Carbon dioxide
(B) Only nitrogen
(C) Only oxygen
(D) Nothing
14. What do we feel as moving air? [1]
(A) Wind
(B) Rain
(C) Sunlight
(D) Heat only
15. What can pollute the air? [1]
(A) Smoke and vehicle emissions
(B) Fresh flowers
(C) Clean water
(D) Green trees
16. Why is clean air important? [1]
(A) For our health and the environment
(B) It's not important
(C) No reason
(D) Only for looks