click below
click below
Normal Size Small Size show me how
8th Science Water Cy
8th Science Water Cycle
| Term | Definition |
|---|---|
| aquifer | underground layer of porous rock or sand that contains water |
| condensation | change from gas to liquid |
| evaporation | change from liquid to gas below boiling point |
| freezing | change from liquid to soild |
| glacier | large slowly moving body of ice and snow |
| melting | change from solid to liquid |
| phase change | change from one state of matter to another |
| precipitation | water that falls to the Earth's suface |
| reservoir | body of water used to store water for human use |
| run off | water that moves across surface of land into streams or rivers |
| transpiration | release of water from the leaves of plants |
| water cycle | continious movement of water |
| bacterial pollution | presence of harmful bacteria in the water supply |
| nutrient pollution | presence of excessive nutrients in the water supply |
| sediment pollution | excess sediment such as silt or clay |
| toxic pollution | presence of toxic substances in the water supply |
| water pollution | introduction of harmful substances to the water supply |
| fresh water | water with no salt content |
| salt water | water that contains salt and other minerals |
| divide | a ridge from which water flows in different directions |
| drainage basin | area into which all water from one side of the divide flows |
| turnover | rising and sinking of cold and warm layers in a lake |
| eutrophication | increase in nutrients in lake or pond |
| iceberg | mass of ice floating in the ocean |
| ground water | water held underground |
| permeable | substance liquids can flow though |
| impermeable | substance liquids can not flow through |
| water table | top of the region that is saturated |
| spring | flow of water from the ground at a place where the surface is below the water table |
| artesian well | a well where water flows naturally because it is under pressure |