Question

Answer the following questions.

1. What is the composition of air?
2. Why do we need air to hear sounds?
3. How does air help to keep the earth cool?
4. Why is air important for us?
5. What is air pressure?
2. Fill in the blanks.​

Answer 1

Answer:

Q. 1

Nitrogen - 78 percent

Oxygen- 21 percent

Argon- 0.93 percent

carbon dioxide- 0.04 percent

Q2.

Sound cannot be carried in empty vacuum of space because sound waves need a medium of vibrate through air or water

Explanation:

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