Chapter 20. Weather. Section 20.1. Meteorology- study of weather. Air mass: - large body of air, in the lower troposphere. -May be several kilometers in diameter and height -has similar temperature and humidity through out the air mass.
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- large body of air, in the lower troposphere.
-May be several kilometers in diameter and height
-has similar temperature and humidity through out the air mass
-air masses from the poles are cold and air masses from the tropics are warm.
-Air masses formed over land will be dry
- Air masses formed over water will be humid
ex: Air masses moving south from Canada will slowly warm up
-Temperature is determined by where it began:
-Arctic, Polar, or Tropical
-Humidity is determined if air mass began over sea (maritime) or over land (continental)
Cloud to cloud
Cloud to ground
One point in a cloud to a second point in the same cloud
may be a meter wide to 1 km wide
May occur anywhere and anytime of year.
US has the highest number of tornadoes than anywhere else in the world
this is because the ocean water is warmest
What stops a hurricane?
cold water, sheering winds, land