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Mr. Biando's Lab
Mr. Biando's Lab - Weather - Air Masses/Fronts
| Term | Definition |
|---|---|
| Air Mass | A large body of air where temperature and moisture content are constant throughout. |
| Front | The boundry between air masses of different densities and usually different temperatures. |
| Cyclone | An area in the atmosphere that has lower pressure than the surrounding areas and winds that spiral towards the center. |
| Anticyclone | The rotation of air around a high-pressure center in the direction opposite to the Earth's rotation. |
| Maritime Polar Air Mass | A large wet cold body of air that forms over a body of water from a polar region. |
| Maritime Tropical Air Mass | A large wet warm body of air that forms over a warm body of water fron a tropical region. |
| Continental Polar Air Mass | A large dry cold body of air that forms over land from a polar region. |
| Continental Tropical Air Mass | A large dry warm body of air that forms over land from a tropical region. |
| Occluded Front | A front that forms when a warm air mass gets caught between two colder air masses, producing cool temperatures and large amounts of snow or rain. |
| Stationary Front | A front that forms when a cold air mass meets a warm air mass, in which neither have enough force to lift the warm mass, so they stall and cause many days of cloudy wet weather. |
| Cold Front | A front that forms where cold air moves under warmer air, pushing it up, and causes cold dry weather. |
| Warm Front | A front that forms where warm air moves up and over the colder air, and causes drizzly rain followed by clear warm weather. |