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Power point 1

  1. 1. Plate Tectonics<br />Casey Ferranti<br />Central Michigan University<br />EDU 290: Technology in Education<br />
  2. 2. <ul><li>Alfred Wegener’s hypothesis
  3. 3. The continents were once a single landmass
  4. 4. He called this landmass Pangaea</li></ul>Continental Drift<br />
  5. 5. <ul><li>Continents fit together like pieces of a puzzle
  6. 6. Two million years ago Pangaea broke apart
  7. 7. The continents slowly drifted to their current locations</li></li></ul><li>PangaeaThe Supercontinent<br />http://wordrogue.com/wp-content/uploads/2010/03/pangaea1.jpg<br />
  8. 8. Present Day<br />http://www.flickr.com/photos/europeanspaceagency/5017629700/<br />
  9. 9. Wegener’s ideas evolved into <br />The Theory of Plate Tectonics <br />
  10. 10. <ul><li>Earth is made up of plates
  11. 11. Plates float on the asthenosphere
  12. 12. Made of molten rock
  13. 13. Flows like a liquid
  14. 14. Results in constant motion</li></li></ul><li>Three Types of Plate Boundaries<br />
  15. 15. Convergent Boundaries<br />Divergent Boundaries<br />Transform Fault Boundaries<br />
  16. 16. <ul><li>Two plates move towards each other</li></ul>Convergent Boundaries<br />http://www.nasa.gov/audience/forstudents/5-8/features/F_Earth_Has_Faults.html<br />
  17. 17. <ul><li> Two plates move apart</li></ul>Divergent Boundaries<br />http://www.nasa.gov/audience/forstudents/5-8/features/F_Earth_Has_Faults.html<br />
  18. 18. http://www.gweaver.net/techhigh/projects/period1_2/Yellowstone/Plate%20Tectonics.html<br />Transform Fault Boundaries<br /><ul><li> Two plates slip and slide past each other</li></li></ul><li>Plate Interactions<br />
  19. 19. <ul><li>Neither plate submerges
  20. 20. Collision rumples the Earth’s surface
  21. 21. Produces mountain ranges</li></ul>Continental-Continental Convergence<br />
  22. 22. Himalaya Mountains<br />http://www.flickr.com/photos/dainismatisons/3488357818/<br />
  23. 23. <ul><li>The denser oceanic plate will sink
  24. 24. Results in volcanic activity</li></ul>Oceanic-Continental Convergence<br />http://tmp.kiwix.org:4201/A/Plate_tectonics.html<br />
  25. 25. <ul><li>One plate usually submerges
  26. 26. Results in an oceanic trench</li></ul>Oceanic-Oceanic Convergence<br />
  27. 27. Mariana Trench<br />http://unheardnomore.blogspot.com/2010/02/hearing-on-marianas-trench-marine.html<br />
  28. 28. <ul><li>When oceanic plates separate molten rock from beneath fills the gap
  29. 29. Creates new ocean floor</li></ul>Oceanic-Oceanic Divergence<br />
  30. 30. http://www.passmyexams.co.uk/GCSE/physics/plate_tectonics.html<br />This phenomenon is called<br />Seafloor Spreading<br />
  31. 31. <ul><li>The land separates
  32. 32. Surrounding water fills the space
  33. 33. Creates a new ocean basin </li></ul>Continental-Continental Divergence<br />
  34. 34. The End<br />
  35. 35. Plate Tectonics<br />http://www.cotf.edu/ete/modules/msese/earthsysflr/plates1.html<br />Continental Drift and Plate-Tectonics Theory<br />http://www.infoplease.com/ipa/A0001765.html<br />Plate Tectonics<br />http://www.platetectonics.com/book/page_5.asp<br />References <br />

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