1. Global and Local Winds Why does Air Move ?
What is the Coriolis effect ?
What are global winds ?
What are local winds ? Describe the formation of land and sea breezes

2. Why does Air Move ?
The movement of air caused by differences in air pressure is called Wind
Differences in air pressure is caused by unequal heating of the earth
Air at the equator is warmer and less dense so it rises creating an area of low pressure
At the poles, the air is colder and more dense so it sinks creating areas of high pressure
This cold polar air then flows towards the equator

4. What is the Coriolis Effect ?
The apparent curving of the path of winds and ocean currents due to earth’s rotation is called the Coriolis effect
Because of the coriolis effect, in the Northern Hemisphere winds traveling north curve east ( clockwise) and winds traveling south curve west ( counterclockwise)
Flipped in the Southern Hemisphere

5. What are global winds ?
The unequal heating of Earth’s atmosphere by sunlight produces global winds.
The combination of high-pressure polar air + low-pressure equatorial air, and the coriolis effect produce global winds.
The angle at which sunshine strikes Earth’s surface in MAINLY responsible for the unequal heating of Earth’s surface.

6. Local Winds
Local Winds generally move short distances and can blow from any direction
They are affected by the geographical features of an area, which can produce temperature differences that cause local winds
Sea and land breezes are both examples of this

7. Land and Sea Breezes

8. Quick Check
What combination creates global winds? a. low-pressure polar air and low-pressure equatorial air. b. low-pressure polar air and high-pressure equatorial air c. high-pressure polar air and high-pressure equatorial air d. high-pressure polar air and low pressure equatorial air

9. Quick Check
What makes global winds curve rather than move in straight lines? a. differences in air pressure b. differences in density c. differences in temperature d.Earth’s rotation on its axis

10. Quick Check
Which combination of properties describes cold air? a. high density and low pressure b. low density and low pressure c. high density and high pressure d. low density and high pressure

11. Quick Check
Global winds blow a. now and then in unpredictable directions. b. now and then in predictable directions c. almost constantly in unpredictable directions d. almost constantly in predictable directions

12. Quick Check
Which combination of properties describes warm air? a. low pressure and low density b. low pressure sand high density c. high pressure and high density d. high pressure and low density

13. Quick Check
Differences in air pressure is called a. a tide. b. a current. c. winds. d. waves.

14. Quick Check
Compared to warm air, cool air is a. less dense and has a higher pressure. b. more dense and has a higher pressure. c. more dense and has a lower pressure. d. less dense and has a lower pressure.

15. Quick Check
Why does warm air rise and cold air sink? a. because warm air is less dense than cold air b. because warm air is denser than cold air c. because cold air is less dense than warm air d. because warm air has less pressure than cold air does

16. Quick Check
In which wind belt is most of the United States located? a. northeast trade winds b. southeast trade winds. c. westerlies d. doldrums