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8th Science

Chapter 8, CC 4, A Beka Book

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