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Weather
Bonnie Branch 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 |