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Chapter 8, CC 4, A Beka Book

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Question
Answer
Air Mass   A large body of air with a relatively uniform temperature, humidity, and pressure  
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The density of an air mass is affected by the ____, ____, and ___.   temperature, humidity, pressure  
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The cooler the air, the ___ the density.   higher  
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The lower the humidity, the ___ the density.   higher  
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The lower the pressure, the ___ the density.   lower  
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An air mass that forms over the tropics   Tropical air mass  
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An air mass that forms over a cold region   Polar air mas  
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An air mass that forms over the sea   Maritime air mass  
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An air mass that forms over land   Continental air mass  
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Maritime tropical air masses   Humid air masses that form over tropical and subtropical waters  
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Continental tropical air masses   Warm, dry air masses that form over deserts  
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Maritime polar air masses   Cool, wet air masses that form over oceans of frigid regions  
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Continental polar air masses   Cold, dry air masses that originate over cold regions  
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Arctic air masses   Dry, frigid air masses that form over snow-and-ice-covered portions of the Artic  
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Sometimes, an air mass remains stationary over a region for a long time. If this occurs, the region experiences ___ weather.   air-mass  
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Front   The boundary between a warm and a cold air mass  
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Warm front   Occurs when a warm air mass moves into a region occupied by a cold air mass  
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Cold front   Occurs when a cold air mass moves into the territory of a warm air mass  
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Stationary front   Occurs when two air masses push against each other, but neither on advances  
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Cold fronts move ___ than warm fronts.   faster  
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Occluded front (or occlusion)   A combination of three air masses forms this Y shaped front  
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If the overtaking cold air mass is colder than the stationary cold air mass, the front is called a(n) ___ ____.   cold occlusion  
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If the overtaking air mass is warmer than the stationary air mass, it is a(n) ___ ___.   warm occlusion  
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Rotating low pressure areas   lows or cyclones  
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Frontal cyclone   A low that forms along a front  
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