1. What is moving air called?
i) storm
ii) lightning
iii) air
Answer: iii) air
2. What gas helps to ignite a fire?
i) The oxygen
ii) carbon dioxide
iii) Methane
Answer: i) Oxygen
3. What is the atmosphere that surrounds the Earth's surface called?
i) air
ii) The atmosphere
iii) Air particles
Answer: ii) The atmosphere
4. The What is the air component used by green plants to prepare their food?
i) air
ii) Oxygen
iii) Carbon dioxide
Answer: iii) Carbon dioxide
5. For what century did people think that air was just a mixture of gases?
i) to the eighth century
ii) to the eighteenth century
iii) neither
Answer: ii) To the eighteenth century
6) Question
i) 99%
ii) 83%
iii) 72%
Answer: i) 99%
7. What test does the picture below represent?
i) Experiment with bottled water
ii) Test with empty bottles
iii) Both of the above
Answer: ii) Test with empty bottles
8. What is the English form of the word 'smoke'?
i) Atmosphere
ii) air
iii) Smoke
Answer: iii) Smoke
9. When air comes in contact with a surface it condenses ?
i) cool
ii) hot
iii) Moderately hot
Answer: i) Cold
10. About how much space in the air does nitrogen occupy?
i) 4/5
ii) 1/2
iii) 7/9
Answer: i) 4/5
11. What is in the smoke?
i) Gas
ii) Fine dust particles
iii) Both of the above
Answer:iii) Both of the above
12. It is always in the air.
i) smoke
ii) The dust particles
iii) neither
Answer:ii) Dust particles
13. What do we take in when we breathe?
i) by the mouth
ii) by the ears
iii) Through the nostrils
Answer: iii) Through the nos
14. What can animals not live without?
i) of plants
ii) of the people
iii) Option 3
Answer: i) Of plan
15. What is the English form of the word 'air connection'?
i) Oxygen
ii) air
iii) Composition of air
Answer: iii) Composition of air
16. If there is an empty bottle, can you tell what is inside the bottle?
i)wind
ii) water
iii) nothing
Answer: i) Wind
17. What is expressed by the picture below?
i) Different types of wheels
ii) with oxygen in the air
iii) Wind directional instruments
Answer: iii) Wind directional device
18. What is the English form of the word 'windmill'?
i) Atmosphere
ii) Windmill
iii) Composition of air
Answer: ii) Windmill
19. What is the gas required by living things?
i) Oxygen
ii) nitrogen
iii) Carbon dioxide
Answer: i) Oxygen
20. What gases do plants respire?
i) nitrogen
ii) Carbon dioxide
iii) Oxygen
Answer: iii) Oxygen
