6 terms

Air Pressure and Fronts

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Warm Front
a boundary between two air masses (one cold and the other warm) moving so that the warmer air replaces the colder air
Low Pressure System
a whirling mass of warm, moist air. Because warm air is lighter and less dense than cool air, it rises, and then cooler air flows in underneath. Brings storms, strong winds, and changing unstable air
Front
a boundary between two air masses, resulting in stormy weather. A front is usually a line of separation between warm and cold air masses
High Pressure System
a whirling mass of cool, dry air. Because cool air is heavy and denser than warm air, it sinks. Brings fair weather, sunny skies, light winds, and stable weather
Air (barometric) Pressure
the weigh of air pressing down on earth. Air pressure can change from place to place, and this causes air to move, flowing from areas of high pressure towards areas of low pressure
Cold Front
a boundary between two air masses (one cold and the other warm) moving so that the colder air replaces the warmer air