Question
(a) Why is one’s breath visible in winter but not in hot summer?
(b) How does water get cooled in earthen pots?
Solution
(a) There are water vapours in the exhaled breath which condense into small droplets of water in winter and become visible.
But in summer the condensation does not take place.
(b) There are pores in the earthen pots and from these pores, water oozes out and evaporation takes place. Now, since cooling is caused after evaporation, therefore, water gets cooled down.
