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Weather
6th Grade - Weather
Term | Definition |
---|---|
Evaporation | changing of a liquid into a gas |
Transpiration | process by which plants give off water vapor into the air |
Capacity | amount of material something can hold |
Saturated | filled to capacity |
Specific humidity | actual amount of water in the air |
Condensation | changing of a gas to a liquid |
Dew point | temperature to which air must be cooled to reach saturation |
Frost | ice formed from condensation below the freezing point of water |
Cirrus cloud | light, feathery cloud |
Cumulus cloud | big, puffy clouds |
Stratus cloud | sheet-like cloud that forms layers across the sky |
Precipitation | water that falls to Earth from the atmosphere |
Rain gauge | device used to measure precipitation |
Air mass | large volume of air with about the same temperature and amount of moisture throughout |
Polar air mass | air mass that forms over cold regions |
Tropical air mass | air mass that forms over warm regions |
Front | boundary between air masses of different densities |
Cold front | forward edge of a cold air mass, formed when a cold air mass pushes under a warm air mass |
Warm front | forward edge of a warm air mass, formed when a warm air mass pushes over a cold air mass |
Thunderstorm | storm with thunder, lightning, and often heavy rain and strong winds |
Tornado | small, very violent funnel-shaped cloud that spins |
Hurricane | tropical storm with very strong winds |
Station model | record of weather information at a weather station |
Millibar | unit of measurement for air pressure |
Isobar | line on a weather map that connects points of equal air pressure |
Isotherm | line on a weather map that joins places that have the same temperatures |