2R Science
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19 terms
Terms | Definitions |
|---|---|
 weather | what the air outside is like |
| weather pattern | a change in the weather that repeats |
| season | a time of year that has a certain kind of weather |
| winter | the coldest season |
| summer | the hottest season |
| fall | the season in which the air becomes cooler |
| spring | the season in which the air becomes warmer |
| temperature | how warm something is |
| thermometer | a weather instrument that measures the temperature of the air |
| wind | moving air |
| anemometer | a weather instrument that measures wind speed |
| precipitation | water that falls from the sky in one of 4 forms: rain, snow, sleet or hail |
| water cycle | the movement of water over and over, from Earth's surface, into the air, and then back to Earth's surface |
| evaporation | the process whereby sun heats water and changes the water into a gas, called water vapor |
| water vapor | the gas formed when water evaporates |
| condensation | the process whereby water vapor changes into tiny drops of water and forms a cloud |
| drought | a long period of time when it does not rain |
| flood | when it rains too much |
| weather vane | a weather instrument used to tell the direction of the wind |
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