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15 Cards in this Set

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Tropical
A warm air mass that forms in the tropics and has low air pressure.
Polar
A cold air mass that forms north of 50° north latitude or south of 50° south latitude and has high air pressure.
Maritime
A humid air mass that forms over oceans.
Continental
A dry air mass that forms over land.
Air Mass
A huge body of air that has similar temperature, humidity, and air pressure at any given height.
Front
The boundary where unlike air masses meet but do not mix.
Occluded
Cut off, as in a front where a warm air mass is caught between two cooler air masses.
Cyclone
A swirling center of low air pressure.
Anticyclone
A high-pressure center of dry air.
Storm
A violent disturbance in the atmosphere.
Thunderstorm
A small storm often accompanied by heavy precipitation and frequent thunder and lightning.
Lightning
A sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud, between nearby clouds, or between a cloud and the ground.
Tornado
A rapidly whirling, funnel-shaped cloud that reaches down to touch Earth’s surface.
Hurricane
A tropical storm that has winds of about 119 kilometers per hour or higher.
Storm Surge
A “dome” of water that sweeps across the coast where a hurricane lands.