why does a lump of cotton wool shrink in water
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Cotton wool remains fluffy because of air trapped in it. When a lump of cotton wool is dipped in water, the air goes out of the lump. Due to this, the cotton wool shrinks when dipped in water. ... Thus, both plants and animals help each other in the exchange of gases in the atmosphere.
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cotton wool is puffy because of air present in it when it is put in water the air get displaced by water so that is why it shrinks
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