Question

The temperature of water is never 1000C in lakes, seas, rivers. How then does it change
into vapours? Why aren’t the lower layers hot?

Detailed answer plz

Answer 1

the definition of evaporation is- the process of converting liquid state into vapour at any temperature which is below it's boiling point is called evaporation

Answer 2

The normal boiling point of the distilled water is approximately hundred degree Celsius.

But the water present in the various oceans,rivers,lakes don't contain pure distilled water.They also contain different other substances which ruins the purity of the water.

That's why they don't evaporate in the exact temperature of the hundred degree Celsius.