Science ch3 sec 1

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air mass

A huge body of air that has similar temperature, humidity, and air pressure at any given height.
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.
continental

A dry air mass that forms over land.
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.
maritime

A humid air mass that forms over oceans.
anticyclone

A high-pressure center of dry air.