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प्रश्न
List five activities that are possible due to the presence of air.
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उत्तर
- Respiration
- Photosynthesis
- Burning
- Movement of sailing yachts, gliders, parachutes, airplanes
- Generation of electricity by windmills
संबंधित प्रश्न
What was the ancient belief regarding the nature of matter ?
What do you observe when a burning candle is covered with an inverted jar.
Give two uses of the following component present in air:
water vapour
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Why is it said that-
Air is a homogeneous mixture of various gases.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
What is wind energy?
Wind does not help in the movement of which of the following?
Explain the following observations very briefly
A firki does not rotate in a closed area.
