Write a speech on air around us for 2 minutes.
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Step-by-step explanation:
- Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour and few other gases. Some dust particles also be present in it. They envelope of air that surround the earth is known as atmosphere.
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Answer => Air is mixture of nitrogen, oxygen, carbon dioxide, water vapour and a few other gases. Some dust particles may also be present in it.
Air is a mixture of gases, mainly containing nitrogen (about 78% by volume) and oxygen (about 21% by volume). The remaining 1% is made up a gas called argon (about 0.9%), Carbon dioxide (0.03%) and small amounts of other gases. Varying quantities of dust, smoke and water vapour are also presents. The amount of these in the air varies from place to place and from time to time.
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