Evaporation takes place because the
most energetic liquid molecules escape
from the liquid's surface and enter the air.
Therefore the kinetic energy of the
remaining molecules is less, so the
temperature of the liquid decreases. This
means that evaporation causes cooling.
The rate of evaporation can be increased by:
Increasing the surface area of the liquid
Increasing the temperature of the liquid
creating a draught of air across the liquid's surface
Condensation is when a gas turns into a liquid. This often
takes place on cold surfaces such as windows and mirrors.