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front
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Facts You Should Know: Weather Quiz
Weather Words Vocabulary Quiz
April Showers to March’s Lions and Lambs
Winter Weather Words Quiz
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12 Greek Gods and Goddesses
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Why Are Some Time Zones 30 Minutes Off Instead of an Hour?
7 of History's Most Notorious Serial Killers
New Seven Wonders of the World
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Ten Days That Vanished: The Switch to the Gregorian Calendar
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Earth Sciences
front: Media
meteorology
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Videos
Explore what happens when cold and warm air masses collide
Weather is created by the movement and interaction of air masses of different temperatures.
Video: Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.com
Images
cold-air outbreak
Series of weather maps showing the evolution of a cold front in North America over...
Encyclopædia Britannica, Inc.
World patterns of thunderstorm frequency.
Encyclopædia Britannica, Inc.
Horizontal divergence and convergence patterns associated with the polar-front jet.
Encyclopædia Britannica, Inc.
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in these related Britannica articles:
Media for: Earth sciences
Media for: physical science
Media for: air mass
Media for: weather