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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
Fill in the blank:
_____________ discovered the oxygen gas.
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Name two important processes supported by oxygen present in air.
Define the following:
Respiration
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
How is light scattered by the air?
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Mention two advantages of wind energy.
Mention two uses of air.
