Question

How does the water kept in an
earthen pot (matka) become cool
during summer?
​

Answer 1

There are holes present on the outer surface of earthern pots.The water gathers in these holes and observe heat from the surrounding and evaporates which causes cooling effect.Thats why water kept in an earthen pot become cool during summer.

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Answer 2

$\huge\mathfrak\red{heya\:Mate}$

$\huge\boxed{\fcolorbox{blue}{pink}{Answer}}$

We know that evaporation cause colling.

This fact is based on Earthern pot.

when we keep water in Earthern pot which contains very tiny perforated holes from which water molecule having high kinetic energy get evaporated by absorbing some heat. The heat loss makes water cool.