Elective Geography Secondary 3 Express (New)- Plate Tectonics 3
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Elective Geography Secondary 3 Express (New)- Plate Tectonics 3 Presentation Transcript

  • 1. + Elective Geog (New) Secondary 3 E Week 4: Living with Tectonic Hazards
  • 2. + 2 Lesson Outcomes  By the end of the lesson, we will be able to  describe the global distribution of tectonic plates and  types of plate boundaries.
  • 3. + 3 Jig Saw Puzzle  Eachenvelope contains a cut out world map which shows the names of plates and their boundaries.  Inyour groups, try to piece together your jigsaw pieces and stick it onto a piece of paper.
  • 4. + 4  How would you describe the pieces of the jigsaw?  What do the lines represent?  Which continent do we live in?  What observations can you make about the plate and the related continent that we live in?
  • 5. + 5 Important Note!  Plates are NOT continents  Plates include both continental and oceanic crust.
  • 6. + 6 Types of Plate Boundaries
  • 7. + 7 Different types of plate boundaries  Divergent: where plates move away from each other  Convergent: where plates move towards each other  Transform: where plates move past each other
  • 8. + 8 Note areas with earthquakes & volcanic activities
  • 9. + 9 Handout: KQ1 SH3a
  • 10. + 10 Divergent Plates  Areaswhere two plates move away from each other  Magma moves upward to the surface where it cools to form new oceanic crust along these boundaries  Oceanic-oceanic  Continental-continental
  • 11. + 11 Oceanic-oceanic At various points along the ridge, magma The newly formed (youngest) rocks are builds up above the ocean to form volcanic closest to the middle of the ridge/plate islands. boundaries. Magma rises at the zone of New sea floor is formed when the magma divergence/spreading zone to form a ridge of Magma rises from the mantle to fill the gap cools and solidifies. This process is called new ocean floor called mid-oceanic ridge. between the plates as they diverge. sea-floor spreading.
  • 12. 12
  • 13. + 13 Oceanic-oceanic
  • 14. + 14 Complete the following:
  • 15. + 15 Continental-continental
  • 16. + Elective Geog (New) Secondary 3 E Week 4: Living with Tectonic Hazards
  • 17. + 17 Recall  Types of Plate Boundaries?  What must you remember?  Drawing  Direction of Plate Movement  Plates Involved  Resulting Landform  Example
  • 18. 18
  • 19. 19armanalluwie.blogspot.com
  • 20. + 20 Continental-continental How to draw? Pg 23
  • 21. + 21 Rift valleys and Block mountains  A fault  Fracture in the rocks along which the rocks are displaced  Rift Valley  Is a valley with steep sides that is formed when the sections of the crust extend along fault lines  Block Mountain  A block of land with steep sides
  • 22. + 22 Afar Triangle, Triple Divergent Triangle
  • 23. 23armanalluwie.blogspot.com
  • 24. 24armanalluwie.blogspot.com
  • 25. 25http://www.youtube.com/watch?v=ic54PSuQwLE