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प्रश्न
List five activities that are possible due to the presence of air.
उत्तर
- Respiration
- Photosynthesis
- Burning
- Movement of sailing yachts, gliders, parachutes, airplanes
- Generation of electricity by windmills
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Name two important processes supported by oxygen present in air.
Give two uses of the following component present in air:
oxygen
How is air useful to agriculture?
Name two air pollutants which cause global warming.
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.
Answer in your own words.
What are the various constituents of air? Write their uses.
Mention two uses of air.
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
