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The Water Cycle
| Term | Definition |
|---|---|
| Evaporation | The process in which the Sun heats liquid water which rises as water vapor into the air |
| Condensation | The process in which water vapor in the air cools and changes into liquid again |
| Precipitation | The process in which any liquid or frozen water that forms in the atmosphere falls back to the earth. |
| Types of Precipitation | Rain Snow Sleet Hail |
| The 3 Main Factors that control the Water Cycle | The Sun The Atmosphere The Oceans |
| Weather | The state of the atmosphere in a short, specific period of time. Days, weeks, months. |
| Climate | The atmospheric conditions on average for long period of time. Decades, centuries. |
| Temperature | how hot or cold; measured with a thermometer; land & water absorb the sun’s heat. |
| Cloud Cover | water condenses into tiny drops; cirrus, stratus, or cumulus; nimbus are rain clouds. |
| Air pressure | force exerted by air on a surface; measure by a barometer; can be high or low. |
| Wind speed | moving air in the atmosphere, measured by anemometer. |
| Humidity | amount of water vapor in the air; measured by hygrometer. |
| Low pressure | generally caused by warm temperatures. |
| High pressure | generally caused by cool temperatures. |
| Transpiration | Plants release water vapor into the air. |
| Runoff | Excess rainwater flows to a water source, like a river. |
| Accumulation | Precipitation is stored in a lake, glacier, river, or ocean. |
| Percolation | Water slowly seeps down into the layers of soil and rock. |
| Thermometer | Instrument that measures the temperature. |
| Rain Gauge | Instrument that measures how much rain has fallen. |
| Anemometer | Instrument that measures the speed of the wind. |
| Barometer | Instrument that measures air pressure. |