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Tuesday, October 23 rd

Tuesday, October 23 rd. A collision between 2 pieces of continental crust at a converging boundary produces a: mid-ocean ridge Deep-ocean trench rift valley Mountain range. Tier 2 PT= Thursday. Welcome to Ms. Evans Cheer Camp. When I say transform you say Slide . Transform.

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Tuesday, October 23 rd

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  1. Tuesday, October 23rd A collision between 2 pieces of continental crust at a converging boundary produces a: • mid-ocean ridge • Deep-ocean trench • rift valley • Mountain range

  2. Tier 2 PT= Thursday

  3. Welcome to Ms. Evans Cheer Camp

  4. When I say transform you say Slide

  5. Transform

  6. Transform

  7. When I say Divergent you say Apart

  8. Divergent

  9. Divergent

  10. When I say convergent you say Collide

  11. Convergent

  12. Convergent

  13. The Continents Slow Dance • The plates are moving at a very slow rate of about one to ten centimeters per year. • In areas plates are moving together and others are moving apart.

  14. Review Plate Tectonics #1What Causes plate Tectonics?!? http://www.youtube.com/watch?v=0mWQs1_L3fA

  15. Can you explain this diagram? Click here for a hyperlink to an animation of convection

  16. Let’s Draw It out!

  17. Review Plate Tectonics #2Convergent Boundaries

  18. A convergent boundary is where two plates come together, or converge. The result of the plates hitting together is called a collision.

  19. There are three combinations of how earth's crust can come together. a. Continental crust to continental b. Continental crust to oceanic c. Oceanic crust to oceanic

  20. a. Continentalcrust to continentalcrust Before collision MOUNTAINS Example: India-Asia (Himalayas) After collision from: http://www.geo.lsa.umich.edu/~crlb/COURSES/270

  21. Eurasian plate Indian plate Indian plate (continental crust) running into Eurasian plate (continental crust)

  22. Himalaya Mountains From space

  23. Even the Appalachian Mountains!

  24. Folded mountains – notice the rock layers

  25. b. Continental &Oceanic SUBDUCTION

  26. The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is called Subduction

  27. Why Does the Oceanic Crust sink below the Continental Crust? Oceanic crust is MORE DENSE than Continental!

  28. Because one plate gets pushed under another, it is called subduction. • This is where volcanoes and trenchesform! all from: http://www.geo.lsa.umich.edu/~crlb/COURSES/270

  29. Volcanoes form where a convergent boundary occurs between oceanic crust and continental crust.

  30. South American plate (continental crust) running into Nazca plate (oceanic crust)

  31. Andes Mts. From space View looking south – ocean to continental

  32. c. Oceanic &Oceanic SUBDUCTION

  33. Volcanoes also form where a convergent boundary occurs between oceanic crust and oceanic crust.

  34. Aleutian islands of Alaska are volcanoes formed by oceanic crust converging with oceanic crust

  35. Following volcanic islands in the Pacific Ocean can show us where oceanic crust is being subducted by oceanic crust.

  36. Here is an great link for seeing where each type of boundary is located. World of Boundaries

  37. Worktime TIER 2Reminders: • Make sure you are following the rubric! • Typed or written in blue/black ink • If you want me to look at it, I will! • Model=you should have three • Script=should be at least two pages • Let you me know if you need help!!!!!!!!!!

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