1. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Bellringer Summarize the processes of radiation, thermal conduction, and convection. Give an example of each. Record your response in your science journal. Chapter I1

2. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Objectives Explain the relationship between air pressure and wind direction. Describe global wind patterns. Explain the causes of local wind patterns. Chapter I1

3. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Agenda Today we will: Day 1 –Learn about winds. –Do now. –Powerpoint

4. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Vocabulary wind Coriolis effect polar easterlies westerlies trade winds jet stream

5. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Why Air Moves Air Rises at the Equator and Sinks at the Poles As the cold air sinks, it creates areas of high pressure around the poles. This cold polar air then flows toward the equator. Pressure Belts Are Found Every 30º Convection cells are separated by pressure belts, bands of high and low pressure. Chapter I1

6. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Chapter I1

7. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Why Air Moves, continued The Coriolis Effect The apparent curving of the path of currents due to the Earth’s rotation is called the Coriolis effect. Chapter I1

8. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Chapter I1

9. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Global Winds Polar Easterlies are the wind belts that extend from the poles to 60° latitude in both hemispheres. Westerlies are the wind belts found between 30° and 60° latitude in both hemispheres. Trade Winds are the winds that blow from 30° latitude almost to the equator in both hemispheres. Chapter I1

10. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Global Winds, continued The Doldrums The trade winds of the Northern and Southern Hemispheres meet in an area around the equator called the doldrums. The Horse Latitudes At about 30° north and 30° south latitude, sinking air creates an area of high pressure called the horse latitudes. Jet Streams are narrow belts of high-speed winds that blow in the upper troposphere and lower stratosphere. Chapter I1

11. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Chapter I1

12. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Local Winds Local winds generally move short distances and can blow from any direction. Mountain and valley breezes are examples of local winds caused by an area’s geography. Sea and land breezes are affected by temperature. Chapter I1

13. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Global Winds and Local Winds Chapter I1

14. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Exit Ticket