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

What is meant by melting point? How is it different from fusion?

$(a)$ "Evaporation causes cooling." Explain the reason for this effect.
$(b)$ Explain two examples from our daily life where we feel the effect of cooling due to evaporation.

Why does the temperature of a substance remain constant during its melting point or boiling point?

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?

The substances that sublime easily are