| A | B |
|---|
| cold front | rapid moving cold air mass runs into a slow moving warm air mass |
| warm front | a rapid moving warm air mass runs into a slower moving cold air mass |
| stationary front | warm and cold air masses meet, but neither can move the other |
| occluded front | a warm air mass is caught between two cooler air masses |
| cold air is more dense than warm air | cold air sinks and warm air rises |
| stationary front | a stalled front, and the water vapor condenses into rain, fog, snow, or clouds |
| a stalled front(stationary front) | can bring DAYS of clouds or precipitation |
| occluded front | two cold air masses with warm air sandwiched in-between |
| occluded front | the two cooler air masses are more dense, they sink, and push the warm air upward |
| cyclone | a swirling center of LOW air pressure (capital L) |
| anticyclone | a swirling center of HIGH air pressure(H) |
| anticyclones spin | CLOCKWISE |
| CYCLONES | spin counter-clockwise |
