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Question
List five activities that are possible due to the presence of air.
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Solution
- Respiration
- Photosynthesis
- Burning
- Movement of sailing yachts, gliders, parachutes, airplanes
- Generation of electricity by windmills
RELATED QUESTIONS
State two similarities and two differences between respiration and burning.
State the meaning of the term Air
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Mention two uses of air.
Take a squeezable bottle. Make a hole on the lid and close the bottle tightly. Bring the bottle near your face and press the bottle. What do you feel?
The composition of air is always exactly the same.
The layer of air around the earth is known as ______.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Air is a ______ of some gases.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
