| A | B |
|---|
| sea level | the level of the surface of an ocean. |
| salinity | A measure of the amount of salt in water |
| aquifer | the layer of rock and soil that groundwater flows through. |
| water table | the top level of the groundwater in an aquifer. |
| watershed | the area from which water drains into a river. |
| reservoir | usually an artificial lake that forms behind a dam. |
| water cycle | the repeated movement of water through the environment in different forms; also called the hydrological cycle |
| condensation | the process by which particles leave a gas and become a liquid |
| precipitation | the water that falls from clouds as rain, hail, sleet, or snow. |
| evaporation | the process by which particles leave a liquid and become a gas |
| sleet | the frozen raindrops that fall as precipitation. |
