Question

explain how water kept in sn earthen pot becomes cool during summer

Answer 1

In an earthen pot, water gets evaporated quickly through the pores. Cooling is caused by evaporation. Some heat energy is utilised duringthe process of evaporation. Since this energy is taken from the water itself, it leads to a lowering of temperature in the remaining amount of water.

Answer 2

It is due to evaporationof water on the surface of the earthan pot which cause cooling. Earthen pot is porous , therefore water comes on it surface.