Question

y does h2o kept in an earthen pot become cool in summer

Answer 1

hye

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this is a nice question

for this u must knowno principle in physics

=when evaporation takes place, cooling occurs

. =>This is because for evaporation to take place, the water needs to change into vapor or gas and this only happens when there is heat in the surroundings

=>. So when the water absorbs heat, it evaporates and this makes the container or surroundings cooler

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hope it helps u 

Answer 2

Water looses its temperature through small pores present in the pot. Hence in an earthen pot (matka) become cool during summer.