is left behind when salt water turns to water vapor.
Water in its gas form is called .
Runoff is when precipitation hits the ground; it is either absorbed, or it flows over the surface of the earth.
Many children around the world do not have fresh drinking water.
Water that is in the ground is called .
Water vapor in the air gets cold and changes back into liquid, forming clouds is called _________________.
Evaporation
Precipitation
Condensation
