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20 Cards in this Set
- Front
- Back
cold front |
a fast-moving cold air mass overtakes a warm air mass |
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warm front |
a warm air mass overtakes a slow moving cold air mass |
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stationary front |
cold and warm air masses meet, but neither can move the other |
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occluded front |
a warm air mass is caught between two cooler air masses |
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polar air mass |
type of air mass that forms north of 50 degrees north latitude and south of 50 degrees south latitude (cold) |
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tropical air mass |
type of air mass that forms in the tropics. it is warm with low air pressure |
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maritime air mass |
type of air mass that forms over oceans and can be very humid |
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continental air mass |
type of air mass that forms over land and can be dry |
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prevailing westerlies |
major wind belts that generally push from west to east |
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jet streams |
high speed winds that are in the prevailing westerlies and are about 10 km above the Earth’s surface |
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fronts |
huge air masses that move across land and oceans and collide with each other |
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cyclone |
a swirling center of low air pressure |
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cyclone |
high pressure centers of dry air |
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coriolis effect |
the effect of Earth’s rotation on the direction of winds and currents in the ocean |
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wind |
moving air caused by the heating of the sun and the Earth’s rotation |
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temperature and moisture |
the characteristics that determine that type of air masses |
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maritime tropical |
a warm AND humid air mass |
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maritime polar |
a cold AND humid air mass |
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continental tropical |
a hot AND humid air mass |
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continental polar |
a cold AND usually dry air mass |