evaporation	Liquid water changing into water vapour, a gas.
condensation	Water vapour changing into liquid water.
precipitation	Water falling from clouds as rain, snow, sleet or hail.
transpiration	Water vapour released into the air from plant leaves.
runoff	Water flowing over the land surface.
infiltration	Water entering the ground from the surface.
groundwater	Water below the water table, filling spaces in soil and rock.
freezing	Liquid water changing into solid ice.