Question

what is composition of air



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Answer 1

Answer:

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Explanation:

The atmosphere is a huge blanket of air that surrounds the earth. It provides us the air we breathe and protects us from the harmful effects of the sun’s rays.  Atmosphere is consists of mainly nitrogen (78%), oxygen (21%), argon (0.93%), carbon dioxide (0.03%) and other gases  like helium, ozone, argon and hydrogen (0.04%).

• Nitrogen is very important for plant’s survival. They cannot take nitrogen directly from the air. Bacteria that live in the soil and roots of some plants take nitrogen from the air and change its form so that plants can use it.

• Oxygen is the second most plentiful gas in the air. Humans and animals take oxygen from the air. Green plants produce oxygen during photosynthesis.

• Carbon dioxide is another important gas. Green plants use carbon dioxide to make their food and release oxygen. Humans or animals release carbon dioxide. The amount of carbon dioxide released by humans or animals seems to be equal to the amount used by the plants which make a perfect balance.

Answer 2

Answer:

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Explanation:

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