1. Friday March 31st 2017 A day Bellwork:
Tear out page 127 (if completed), take out your Heat Transfer paper (if not already turned in) and any late work that you may have.
Complete page 133 in your Science Fusion Book
Agenda:
Wind PPT/Notes
Bill Nye Wind
Complete Packet

2. Wind

3. What is wind?
Wind is the movement of air, from high pressure to low pressure.

4. What causes wind?
Wind is caused by the different temperatures around a planet.
These different temperatures cause the air pressure to change.

5. How is wind measured?
Wind is measured by the direction and speed in which it is headed.
We use an Anemometer to measure wind speed

6. Why does air move?
Warm, less- dense air rises. When it rises it creates an area of low pressure.
Colder, more dense air sinks. When it sinks it creates an area of high pressure

7. How does wind move?
Since air pressure moves from high pressure to low pressure the winds generally move from the poles to the equator.

8. Convection Cells
The circular patterns caused by the rising and sinking of air are called convections cells or current .

9. How does Earths rotation impact wind?
The Earths rotation causes wind to travel in a curved path rather than in a straight line.
Coriolis effect is the curving of a moving object such as wind due to the earths rotation.

10. Does the Coriolis effect impact wind direction?
Winds in the Northern Hemisphere curve to the right.
Winds in the Southern Hemisphere curve to the left.

11. Types of Wind
There are 2 main types of wind
Local winds
Global winds

12. Local Winds
Local winds generally move short distances and can blow from any direction.

13. Global Winds
Global winds are a part of a pattern of sir circulation that moves across the Earth.
Global winds travel long distances and travel in specific directions.

14. There are 5 types of global winds.
Trade Winds
Doldrums and Horse Latitudes
Westerlies
Polar Easterlies
Jet stream

15. Trade Winds
Trade winds blow from 30 degrees latitude to the equator.

16. Trade Winds
Trade Winds

17. Doldrums Areas of little to no wind that occur at the equator.
Dodrum is an Old English word for Foolish. Sailors were considered foolish if they got stuck in these areas.

19. Horse Latitudes
An area of weak winds that occur at 30 degrees north and 30 degrees south latitude.
These area get their name from a time when sailors would get stuck because of the lack of wind and would be forced to throw horses overboard to save drinking water.

21. Westerlies
Wind blowing towards the poles that occur between 30° and 60° latitude.
Westerlies
Westerlies

22. Polar Easterlies
Polar Easterlies
Polar Easterlies are wind belts that extend from 60°to the poles.
Westerlies
Westerlies
Polar Easterlies

23. Jet Stream
Jet streams are narrow belts of high-speed winds that blow in the upper troposphere and lower stratosphere.
The jet stream does not follow a regular path around the earth.
The jet stream controls the movements of storms so it is important in predicting the movement of storms.

24. Local Winds Local winds are influenced by the geography of an area.
Shorelines and Mountains have temperature differences.
These differences in temperature cause land and sea breezes.