Multiple choice

Why does the water in an earthen pot cool in summer?

  1. It is due to the phenomenon of vapourisation.

  2. It is due to the phenomenon of evaporation. The water seeps through the pores in the pot and evaporates.

  3. The mud is bad conductor of heat.

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earthen pots have microscopic pores through which water seeps and evaporates from the outer surface. Evaporation requires latent heat of vaporization, which is drawn from the water inside the pot, cooling it down. This is an effective natural cooling method.