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WARM FRONT
COLD FRONT
A cold front forms when a cold air mass catches up with a warm air mass.
The air is colder behind a cold front.
Cold fronts usually move from west to east across the United States.
As the warm air is pushed upward, it cools and forms clouds. Rain develops and thunderstorms often occur along a cold front.
Stationary Front
A stationary front can stay in one place for several days.
The winds on either side of a stationary front blow in opposite directions.
A stationary front usually moves very slowly or not at all.
A stationary front can bring a constant fall of snow or rain.
WATER CYCLE TERMS
evaporation-liquid water changing to water vapor
condensation-water vapor changing to liquid as it cools
precipitation-rain, hail, snow, or sleet
groundwater-water being stored underground
transpiration-water vapor being released from plants
collection-when water falls back to earth as precipitation and collects in rivers, lakes, streams, the ocean, or on the land
percolation-slow movement of water through soil or rock
surface runoff-water running downhill on the surface of the land
Stratus Clouds
Cumulus Clouds
Cumulonimbus
Cirrus
Published: Nov 12, 2015
Latest Revision: Nov 12, 2015
Ourboox Unique Identifier: OB-77865
Copyright © 2015
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