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20 Cards in this Set
- Front
- Back
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air mass
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A huge body of air that has similar temperature, pressure, and humidity throughout.
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tropical (air mass)
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A warm air mass that forms in the tropics and has low air pressure.
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polar (air mass)
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A cold air mass that forms north of the 50 degree north latitude or south of the 50 degree south latitude and has high air pressure.
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maritime (air mass)
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A humid air mass that forms over oceans.
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continental (air mass)
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A dry air mass that forms over land.
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front
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The area where air masses meet and do not mix.
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occluded
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Cut off, as the warm air at an occluded front is cut off from the ground by cooler air beneath it.
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cyclone
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A swirling center of low air pressure.
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anticyclone
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A high-pressure center of dry air.
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storm
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A violent disturbance in the atmosphere.
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lightning
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A sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud or between a cloud and the ground.
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tornado
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A rapidly whirling, funnel-shaped cloud that reaches down from a storm cloud to touch Earth's surface, usually leaving a destructive path.
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hurricane
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A tropical storm that has winds of 119 kilometer per hour or higher; typically about 600 kilometers across.
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storm surge
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A dome of water that sweeps across the coast where a hurricane lands.
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evacuate
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To move away temporarily.
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flash flood
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A sudden, violent flood that occurs within a few hours, or even minutes of a heavy rainstorm.
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meteorologist
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Scientists who study the causes of weather and try to predict it.
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El Nino
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An event that occurs every 2 to 7 years in the Pacific Ocean, during which winds shift and push warm surface water toward the coast of South America; it can cause dramatic climate changes.
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isobars
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Lines on a map joining places that have the same air pressure.
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isotherms
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Lines on a map joining places that have the same temperature.
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