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Weather Vocabulary
| Term | Definition |
|---|---|
| Evaporation | the process in which matter changes from a liquid to a gas |
| Condensation | the process by which a gas changes into a liquid |
| Precipitation | the falling of liquid or frozen water droplets from clouds |
| Transpiration | the loss of water vapor by plants |
| Air mass | A large volume of air that has fairly uniform properties throughout, such as temperature and moisture content, at a given altitude. These properties reflect the region in which the air mass formed. |
| Jet stream | strong air current that encircles Earth at several miles altitude |
| Warm front | the boundary of an advancing mass of warm air, in particular the leading edge of the warm sector of a low-pressure system. |
| Cold front | A cold front is defined as the leading edge of a cooler mass of air, replacing at ground level a warmer mass of air, which lies within a fairly sharp surface trough of low pressure. |
| Global wind | the atmospheric circulation around Earth that occurs in predictable patterns |
| El Nino | a band of warm ocean water temperatures that periodically develops off the Pacific coast of South America |
| Hurricane | storm with strong winds and rain that forms over tropical waters |
| Tornado | a funnel-shaped cloud or column of air that rotates at high speeds and extends downward from a cloud to the ground |
| Flood | a situation in which water has flowed over the edges of a river |
| High pressure system | A high-pressure area, high or anticyclone is a region where the atmospheric pressure at the surface of the planet is greater than its surrounding environment. |
| Low pressure system | A low-pressure area, low or depression, is a region where the atmospheric pressure is lower than that of surrounding locations. |