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Ch. 24.5

Air Masses & Fonts

QuestionAnswer
Air Mass Air that is uniform in properties (temperature and moisture)
Continental Polar An air mass that forms over Canada; it brings cold, dry air to the Mid-West
Maritime Polar An air mass that forms in the North Atlantic; it brings cool moist air and heavy precipitation to coastal areas (North West)
Maritime Tropical An air mass that forms over tropical waters (like the Gulf); it brings warm moist air to the Mid-West
Continental Tropical An air mass that forms over Mexico; it brings hot, dry air to the South West.
Front A boundary between 2 contrasting air masses; clouds and precipitation occur here.
Cold Front A front in which cold air collides with warm air and sinks under it. The warm air gets pushed up rapidly to form vertical clouds
Warm Front A front in which warm air gradually climbs over cold air, condenses, and forms stratus clouds.
Stationary Front A front that forms when cold and warm air pushes against one another in opposite directions.
Occluded Fronts A front that forms when warm air is trapped aloft by two cold air masses
High Pressure System Areas of fair weather and clear skies; wind moves out of these areas in a clockwise direction and is replaced by cool, dense air from above.
Low Pressure System Areas of clouds and precipitation; wind feed into these areas in a counterclockwise direction; air rises in the center of this area
Thunderstorms and severe weather are associated with this front Cold
Steady rain for a day Warm
Created by: burnsie
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