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Weather
Vocabulary Terms
| Term | Definition |
|---|---|
| weather | atmospheric conditions that change |
| air pressure | force that a column of air applies on air or surface |
| humidity | amount of water vapor in air |
| relative humidity | amount of water vapor in the air compared to the maximum amount of water vapor the air can contain |
| dew point | temperature at which air is saturated and condensation can occur |
| precipitation | liquid or solid form that falls from the atmosphere |
| water cycle | series of natural processes by which water continually moves |
| high pressure system | large body of circulating air with the high pressure near the center |
| low pressure system | large body of circulating air with the low pressure near the center |
| air masses | large bodies of air that have uniform temperature, humidity |
| front | boundary between two air masses |
| tornado | violent, whirling column of air in contact with the ground |
| hurricane | intense tropical storm with winds exceeding 119km/hr |
| blizzard | violent winter storm characterized by freezing temperatures, strong winds, and blowing snow |
| surface report | describes a set weather measurements made on Earth's surface |
| upper air report | describes wind, temperature, and humidity conditions above Earth's surface |
| Doppler radar | specialized type of radar that can detect precipitation and wind |
| isobars | lines that connect all places on a map where pressure has the same value |
| computer model | programs that solve a complex math formulas |