| A | B |
|---|
| hydrosphere | all waters on Earth. |
| salinity | a measure of how salty water is |
| aquifer | the layer of rock and soil that groundwater flows through |
| water table | the top level of groundwater in an aquifer |
| reservoir | a lake formed behind a dam |
| water cycle | the path that water takes as it evaporates from oceans, lakes, and other sources, condenses, and falls to Earth as precipitation, and evaporates or flows back to the sea |
| precipitation | water leaving clouds as rain, snow, sleet, or hail |
| evaporation | the changing of a liquid into a gas |
| transpiration | the movement of water out of plants |
| condensation | the changing of a gas into a liquid |
| sublimation | when ice turns into water vapor without first melting |
| run-off | the flow of water from rain, snowmelt, or other sources over land |
| ground water | rain and melted snow that soaks into the ground |
| surface water | water that includes rivers, streams, and lakes |
| deposition | the laying down of material in a natural process |
| storage | water collection in bodies of water to start the evaporation process over fresh water or ocean water |
| solid | a state of matter in which material has a definite volume but without a definite shape |
| liquid | a state of matter with a definite volume but without a definite shape |
| phase transition | movement from one phase to another caused by a change in temperature-gas, solid, liquid |
| freezing | phase transition-liquid to solid |
| melting | phase transition-solid to liquid |
