$A$ change in the physical state of matter can be brought about:

Sameer once went to his granny's home with his family and he saw his granny serving water from an earthen pot and was surprised to see that and asked granny why she has kept that earthen pot for storing water. His granny then answered him that it keeps the water cool during summers,he then smiled and thanked her.
$(a)$ According to you,how does water kept in an earthen pot become cool during summers?
$(b)$ What kind of qualities are shown by Sameer?

What produces more severe burns,boiling water or steam?

Which of the following will cause more severe burns and why?
$(a)$ Steam at $373 \, K$
$(b)$ Water at $373 \, K$

During summer,if you go near the lake,you feel relief from the heat,why?

Why do we see water droplets on the outer surface of a glass containing ice-cold water?