Wind is always named by where it is
coming from!
What would a wind be named if it is
blowing from Washington to Oregon?
It is called a NORTH wind because it is
moving from the north to the south.
Most often noticed at the beach!
http://www.coolweather.co.uk/
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Land heats up faster than water.
Warm air over land rises.
Air over water moves to shore.
Would occur during the day.
Named a SEA breeze because it comes
from the sea.
http://www.coolweather.co.uk/
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Land cools off faster than water.
Warm air over water rises.
Cool air from land takes its place.
Would occur at night.
Called a LAND breeze because the wind is
coming from the land.
Look at these
two diagrams.
Can you tell
which is the
land breeze
and which is
the sea
breeze?
1. Blow steadily
from the same
direction all the
time.
2. The path is curved
because of the
Coriolis Effect.
http://cimss.ssec.wisc.edu
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Find a partner, a piece of scratch paper, and a pencil
Draw a dot in the center of the paper and label it the
North pole
Person #1- put your pencil point on the North pole.
Try to draw a straight line away from the North
pole.
Person #2 – turn the paper counterclockwise as
Person #1 draws the line.
Why do Global Winds Happen?
• Regions of cold, heavy air have high air
pressure.
– These regions are called highs.
• Regions of warm, light air have low air
pressure.
– These regions are called lows.
• Air moves from regions of high pressure to
regions of low pressure.
• Winds form when air moves.
• As air over a warmer region is heated, it expands
and becomes less dense.
• As air over a cooler region is cooled, it becomes
heavier, or denser.
• The cool air moves in under the warm air. It
pushes the warm air upward.
• As the warm air mixes with the cool air, it
becomes heavier and moves downward.
Let’s Draw Them
Help sailors navigate
global trade routes!
Move weather across the
US!
Jet Stream
1. In the upper troposphere.
2. Very fast 200-400 kmh
3. Go completely around
the earth.
Notice that the jet stream does not stay the same
every day. But it is always there!
Notice on this weather map in motion
how the rain moves toward the east
over time.
Can you answer these review questions?
1. What causes wind?
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What are the two types of wind?
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The uneven heating of the Earth
Local and Global
What heats up faster – land or water?
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LAND