Question

solid (i) (a) ? (b) ? liquid (ii) (c) ? (d) ? gas (iii)

Explanation:

The process of a solid changing to a liquid is melting, liquid to solid is freezing, liquid to gas is vaporization, and gas to liquid is condensation.

Answer:

(a) Melting
(b) Freezing
(c) Vaporization
(d) Condensation