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प्रश्न
State the meaning of the term Air
उत्तर १
Air is matter which occupies space, has mass, exerts pressure and is highly compressible.
उत्तर २
Air refers to the invisible, odorless, and tasteless mixture of gases that surrounds the Earth and forms its atmosphere. It is essential for life on Earth and supports various biological and physical processes.
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संबंधित प्रश्न
Discuss harmful effects of greenhouse effect.
Fill in the blank:
_____________ discovered the oxygen gas.
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State two similarities and two differences between respiration and burning.
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Fill in the blank
Although we cannot see air, we can ___it.
The composition of air is always exactly the same.
______ is important for all living creatures.
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (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 airflow |
| (e) | Wind | (v) | Prevent dust particles |
