Question

how does the water keep in an earthen pot become cool during summer

Answer 1

because evaporation take place there and in pot there small pors by which water come out that water get evaporates and the water which inside the pot that cool

Answer 2

earthen pot contains small pores on its walls . when water is poured into it some of it seeps through these pores and reaches onto the outer surface and on reaching there it evaporates and evaporation cause cooling .