| A | B |
|---|
| pore space | The space between soil particles. |
| water table | The upper area of groundwater. |
| runoff | The water that flows over Earth's surface but does not evaporate or soak into the ground. |
| transpiration | A plant's release of excess water vapor through the stomata on the underside of its leaves. |
| atmosphere | The blanket of gases that surrounds Earth. |
| water vapor | A gas in Earth's atmosphere. |
| ice cap | A thick sheet of ice covering a large area of land. |
| soil water | Water that soaks into the ground. |
| ground water | Water stored in the cracks of underground rocks. |
| evaporation | The process in which water particles change from a liquid to a gas. |
| condensation | The process by which water particles change from a gas to a liquid. |
| cloud | A mass of tiny droplets of condensed water in the atmosphere. |
| precipitation | Water in the atmosphere that falls to Earth as rain, snow, hail or sleet. |
| freeze | The process in which moving particles in water slow down, lose heat, and change from a liquid to a solid. |
| melt | When water particles absorb heat energy and change from a solid to a liquid. |
| water cycle | The continuous movement of water between Earth's surface and the air, changing from liquid to gas to liquid. |
| current | An ocean movement; a large stream of water that flows in the ocean. |
| deep ocean current | A stream of water that flows more than 650 feet beneath the sea. |
| surface current | The movement of the ocean caused by steady winds blowing over the ocean. |
| tide | The rise and fall of ocean water levels. |
| wave | An up-and-down movement of water. |
| erosion | The wearing away of soil and rock particles by waves, wind, running water, or glaciers. |
| deposition | The dropping off of soil and rock particles by waves, wind, running water, or glaciers. |
| irrigation | A way to get water into the soil by artificial means. |
| water treatment plant | A place where water is made clean and pure. |
| filtration | The passing of a liquid through materials that remove impurities. |
| sewage | Water mixed with waste. |
| sewer | A large pipe or channel that carries sewage to a sewage treatment plant. |
| septic tank | An underground tank in which sewage is broken down by bacteria. |
| water conservation | The use of water-saving methods. |
