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प्रश्न
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?
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उत्तर
Air will come rushing out of the bottle.
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संबंधित प्रश्न
What was the ancient belief regarding the nature of matter ?
Discuss harmful effects of greenhouse effect.
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
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Name two air pollutants which cause acid rain.
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
What will happen if the amount of water vapour in the air increases.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
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 |
