1. What is air?
👉 Mixture of gases
2. What is atmosphere?
👉 Blanket of air
3. Name the main gases in air.
👉 Nitrogen and oxygen
4. Which gas is most abundant in air?
👉 Nitrogen
5. Which gas supports burning?
👉 Oxygen
6. Which gas is used by plants?
👉 Carbon dioxide
7. Which gas protects us from sun’s heat?
👉 Ozone
8. Name two other components of air.
👉 Water vapour, dust
9. What percentage of air is nitrogen?
👉 78%
10. What percentage of air is oxygen?
👉 21%
11. What causes changes in weather?
👉 Atmosphere
12. What is wind?
👉 Moving air
13. What causes wind to blow?
👉 Pressure difference
14. From where does wind blow?
👉 High to low pressure
15. What is air pressure?
👉 Weight of air
16. Where is air pressure highest?
👉 Sea level
17. What are permanent winds?
👉 Blow constantly
18. Name one permanent wind.
👉 Trade winds
19. What are seasonal winds?
👉 Change direction seasonally
20. Name one seasonal wind.
👉 Monsoon
21. What are local winds?
👉 Short-duration winds
22. Name one local wind.
👉 Loo
23. What is humidity?
👉 Moisture in air
24. What causes rainfall?
👉 Condensation
25. What is precipitation?
👉 Falling of moisture
26. Name one form of precipitation.
👉 Rain
27. What is climate?
👉 Average weather condition
28. What is weather?
👉 Day-to-day condition
29. Why is air important for life?
👉 Supports breathing
30. What causes air pollution?
👉 Harmful gases
📌 Quick Revision Tricks
👉 Composition of Air:
N-O-C → Nitrogen – Oxygen – Carbon dioxide
👉 Types of Winds:
P-S-L → Permanent – Seasonal – Local