State
(a) the melting point of ice and (b) the boiling point of water.
(a) MELTING POINT OF ICE: Is the constant temperature at which it starts (melting) changing from ice to water. It is 0°C for ice.
(b) BOILING POINT OF WATER: Is that constant temperature at which water starts (BOILING) changing from water to steam (vapours). It is 100°C for water.