Question

1.The layer of air around the earth is known as ___________. 2.Why does a lump of cotton wool shrink in water?
answer it
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Answer 1

Answer:

1.) Ozone

The layer of air around the earth is known as Ozone.

Explanation:

Why does a lump of cotton wool shrink in water?

Ans - A lump of cotton wool has a lot of air trapped inside the space present in its fibers. When this lump of cotton is immersed in water, all the air is replaced by water. Due to this, the cotton lump shrinks down.

Answer 2

Answer:

atmosphere

A lump of cotton wool has a lot of air trapped inside the space present in its fibres. When this lump of cotton is immersed in water, all the air is replaced by water.

Explanation:

I hope this answer will help you.