| Term | Definition |
|---|
| Front | the boundary between air masses of different different densities and usually different temperatures |
| Air Mass | a large body of air that has similar temperature and moisture throughout |
| Cylcone | area in atmosphere that has lower pressure than the surrounding areas with wind spiraling clockwise towards the center |
| Anti-cyclone | the rotation of air around a high pressure center in the direction opposite to the earth's rotation |
| Cold Front | a cold air mass moves under a warm less dense air mass |
| Occluded Front | a warm air mass is caught between 2 colder air masses |
| Stationary Front | a cold air mass meets a warm air mass but the 2 remain separated |
| Warm Front | warm air mass moves over a cold, denser air masses |
| Major air masses that influence weather in US | maritime, continental, polar, and tropical |
| Source region of maritime polar air mass | Northern Canada over Atlantic and Pacific Oceans |
| Air mass cP | continental->forms over land/dry, polar->cold |
| 4 Types of Fronts | warm, cold, occluded, stationary |
| How do fronts cause weather changes? | Warm fronts bring warm weather and drizzly rain. Cold fronts bring cold and heavy rain and snow. Occluded fronts bring cool temperatures, snow and rain. Stationary fronts bring cloudy wet weather. |
| How do cyclones and anti-cyclones affect the weather? | A cyclone causes stormy weather. An anti-cyclone brings dry clear weather because it absorbs moisture. |
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