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Global Winds & Ocean Currents

Global Winds & Ocean Currents. 8.10A recognize that the Sun provides the energy that drives convection within the atmosphere and oceans, producing winds and ocean currents. Warm Up 1. In your Science Journal, answer the question: “ What causes the wind? ”

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Global Winds & Ocean Currents

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  1. Global Winds & Ocean Currents 8.10A recognize that the Sun provides the energy that drives convection within the atmosphere and oceans, producing winds and ocean currents.

  2. Warm Up 1 • In your Science Journal, answer the question: “What causes the wind?” • Quickly find a partner that is not at your table & take turns sharing your explanations. • Together, select the explanation you both think is the most accurate. • Share with the class!

  3. Convection Currents in Air Draw the set-up and make and complete a table in your Science Journal:

  4. CONVECTION transfer of heat by the movement of warmed matter

  5. Hot Air is Less Dense!

  6. Force = Mass X Acceleration increase increase Gravity pulls with more force on heavier objects! The Bigger They Are, The Harder They Fall!

  7. Atmospheric Density What is most dense SINKS!

  8. What Can Convection Do?

  9. CONVECTION

  10. CONVECTION Moves air in the atmosphere!

  11. CONVECTION Wind over the shore changes direction because of EARTH’S UNEVEN WARMING & COOLING!

  12. What Causes Wind? Bill Nye’s Explains Wind in 2 minutes! http://www.youtube.com/watch?v=uBqohRu2RRk&feature=related Bill didn’t use the word “convection”… but he described it! How did he demonstrate convection?

  13. What About Convection in Water? • Water and air are both fluids. • They both move due to convection! • Just like air, when liquid water is heated, it expands, becomes less dense, and rises. Side note: Water is different, however, because of it’s unique structure as a solid. Ice is actually less dense than liquid water whereas other substances are most dense as solids!

  14. CONVECTION IN LIQUIDS!

  15. CONVECTION causes deep ocean currents!

  16. CONVECTION • DEMOS! • Tea Bag “Rocket” • http://www.youtube.com/watch?v=UUYV-h1gCJc • Colored Water • http://www.youtube.com/watch?v=G9QJ1vv2WyM • http://www.youtube.com/watch?v=7xWWowXtuvA

  17. Global Winds Convection causes the rise and fall of air in the atmosphere… v But what causes the other patterns (easterlies, westerlies, etc) in the global winds?

  18. Jet Streams http://www.pbs.org/wgbh/nova/balloon/science/jetstream.html

  19. Global Wind Pattern Challenge! • If you wanted to fly a hot air balloon around the world in the shortest amount of time, which route would you take?

  20. Coriolis Effect • Why do the arrows face the opposite way in the Northern and Southern Hemisphere?

  21. Coriolis Effect • YouTube: Coriolis Effect

  22. LAB: Convection In a Cup For each test, draw and record your observations!

  23. Ocean Currents and Coastal Temperatures

  24. Inland vs. Coastal Cities

  25. Ocean Currents BrainPop: http://www.brainpop.com/science/earthsystem/oceancurrents/ What is the name of this current? It carries warm water from the Gulf of Mexico!

  26. Why aren’t there straight lines between the temperature zones?

  27. Coriolis Effect… again! The direction of surface ocean currents affected by the Coriolis effect!

  28. Ocean Currents

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