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2. Animation of a warm front, author: Dr. Horst Rudolf, university of Bielefeld in cooperation with his pupils
source: http://www.learn-line.nrw.de/angebote/klima/medio/bilder/wfront.gif
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Missing words:
air, cold, humid, warm, warm, more, cold, less, move slowly, cirrus clouds, lifts up, warmer, settle.
Warm fronts:
Warm fronts occur when a .................. air mass approaches a .................. air mass. The warmer air ....................... and rises over the colder air.
.................fronts are usually more gentle than ..............fronts, they ...................................... and gently ..................................... over the cold air moving it out of the way.
Precipitation at warm fronts is usually .............. heavy although more geographically extensive (300-400 km) than at a cold front.
The ............. behind a warm front is warmer and more moist than the air ahead of it.
Warm fronts bring .................... steady lighter rain or snow than cold fronts. This rain can last from a few hours to several days. When a warm front passes through, the air becomes noticeably ......................... and more ....................than it was before.
The first signs of the warm front are the .............................., followed by the cirrostratus, altostratus, nimbocumulus and stratocumulus types of clouds.
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