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Voc Set #7 WMS Sci

Vocabulary #7 Weather 8th Grade Science

The long term average of weather in a particular place that is usually stable and changes slowly. Climate
Description of what the atmosphere is like at a particular time and place. Weather
A large body of air that has the same conditions throughout. Air Mass
The Type of front that occurs when advancing warm air displaces cold air along a gradual slope; represented by evenly spaced red half circles on a weather map. Warm Front
The type of front that occurs when cold dense air forces less dense warm air upward along a steep slope; represented by blue triangles pointing the direction the front is moving on a weather map. Cold Front
The front that occurs when two air masses that have similar temperatures and pressures meet and neither advances; shown by a line with alternating red half circles and blue triangles facing in opposite directions on a weather map. Stationary Front
The type of front that occurs when a cold front overtakes a warm front and forces it upward causing the advancing cold air to collide with another cold air mass; shown on a weather map by alternating, evenly spaced, purple half circles and triangles. Occluded Front
Air from aloft sinks and moves away from the center when it reaches the surface of the Earth; usually associated with fair weather;represented by a blue “H” on a weather map. High Pressure System
Air from the surface rises, cools, and condenses into clouds and precipitation rotates in a counterclockwise direction in the northern hemisphere; usually associated with cloudy weather and precipitation; represented by a red “L” on a weather map. Low Pressure System
Describes a moist airmass that originates over a body of water. Maritime Airmass
Describes a dry airmass that originates over land. Continental Airmass
Warm airmass that originates over the warm waters of the tropics and Pacific Ocean south of California. Tropical Airmass
Cold airmass that originates over Canada. Polar Airmass
Extremely cold and dry air masses that are created over land at very high latitudes. Arctic Airmass
Created by: kkiebler