| A | B |
|---|
| air mass | a huge body of air that has similar temperature, humidity, and air pressure at any given height |
| tropical air mass | warm air mass that forms in the tropics and has LOW air pressure |
| polar air mass | cold air mass that forms north of 50degrees north latitude and south of 50 degrees south latitude-has HIGH air apressure |
| maritime air mass | a humid air mass that has formed over oceans |
| continental air mass | a dry air mass that has formed over land |
| front | the boundary where UNLIKE air masses meet but do not mix |
| occluded front | a front that is 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 |
| anticyclones | HIGH pressure centers of dry air |
