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प्रश्न
Tick (√) the most appropriate answer.
The presence of water vapour in air is essential for :
पर्याय
health and comfort of animals
rate of evaporation from plants and animals
growth of plants
all the above
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उत्तर
all the above
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
Name and briefly explain four ways by which pollution of air caused by humans is minimised.
Write ‘true’ or ‘false for the following;
Carbon dioxide is given out during photosynthesis
Whales come up to the water surface to breathe in oxygen.
The component of air used by green plants to make their food, is ______.
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
State whether the following statement is true or false. If false, correct them.
Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes.
Observe the picture given in Fig. carefully and answer the following questions.
Can you comment on the air quality of the place shown in Fig?
Explain the following observations very briefly
Breathing through mouth may harm you.
