Evaporation and boiling. Evaporation refers to only the surface level turning it into a gas and the vaporization pressure of the liquid remains low. When a substance boils it’s pressure is high and the surface evaporated along with the rest of the liquid at an equal rate. A sign of boiling is the presence of bubbles, which occur only in the process of boiling and not in evaporation. A example of boiling is heating water up to the point until you see steam and bubbles. A example of evaporation is the melting of an ice cube. Hope this helps
