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23 Cards in this Set

  • Front
  • Back
An instrument used to measure wind SPEED.
wind chill factor
The increased cooling that a wind can cause.
local winds
winds that blow over short distances
land breeze
The flow of air from land to a body of water.
Sea and land breezes over a large region that change direction with the seasons.
sea breeze
A wind that blows from an ocean or lake onto the land.
global winds
Winds that blow steadily from specific directions over long distances.
Coriolis effect
The way the Earth's rotation makes winds curve.
Monsoons happen in _______.
The movement of air between the equator and the poles produces?
Global winds
wind vane
A device which determines wind DIRECTION.
The name of a wind tells you__________.
The name of a wind tells you the direction a wind IS COMING FROM.
Name the three major global wind belts.
1. trade winds
2. prevailing westerlies
3. polar easterlies
A calm area near the Equator where warm air rises. There is little or no wind.
(The trade winds meet at the doldrums)
horse latitudes
Belt of calm air at about 30 degrees north and south. Becalmed sailors ran out of food and threw their horses overboard here.
Trade winds
Belt of winds between 30 degrees N or S and the Equator. The winds blow towards the Equator and are turned west by the Coriolis effect.
prevailing westerlies
Belt of winds between 30 and 60 degrees N or S. The winds blow from the SW in the northern hemisphere and from the SW in the southern hemisphere.
Polar easterlies
Belt of winds from the poles to 60 degrees N or S. Winds blow from the poles and and are turned by the Coriolis effect to the west.
polar front
At 60 degrees N and S the polar easterlies meet the prevailing westerlies mixing warm and cold air. The polar front has a MAJOR effect on weather in the USA.
jet streams
Global west winds found 10 kilometers above the Earth and only a few kilometers deep. They blow at 200 to 400 kilometers an hour.
How do jet streams effect airplanes?
Airplanes flying east can be helped by flying in the jet stream, gaining speed and saving fuel. Airplanes flying west are slowed down.
What is the cause of local winds?
The unequal heating of Earth's surface within a small area.
All winds are caused by?
differences in air pressure