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Plate Tectonics

Plate Tectonics. The Earth’s Crust in Motion…. The Theory. In 1910 Alfred begins to wonder…. What’s the relationship? Perhaps all these pieces used to be connected. Continental drift=slow movement over Earth’s surface 300 million years ago…. Supercontinent. Pangea – all lands

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Plate Tectonics

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  1. Plate Tectonics The Earth’s Crust in Motion…

  2. The Theory In 1910 Alfred begins to wonder… What’s the relationship? Perhaps all these pieces used to be connected. Continental drift=slow movement over Earth’s surface 300 million years ago…

  3. Supercontinent • Pangea – all lands • Reptiles and insects • Tropical forrests • -coal deposits Tens of Millions of years!

  4. Structure of the Earth’s Interior

  5. How does it work? Plates – pieces of the lithosphere Plates fit closely together along cracks called Plate Boundaries Convection Currents  movement

  6. Earth’s Puzzle • What plate do we live on? • What plates do we border? • USGS Earth’s Plates • How far do we move every year?

  7. Types of Boundaries • Divergent • Convergent • Transform

  8. Your Task...Get Organized • Get into teams of three • Each person will focus on one type of boundary • divergent (Column A) • convergent (Column B) • transform (Column C) • Look only at your column • Make a concept map

  9. plates are moving apart • new crust is created • Magma is coming to the surface • plates are coming together • crust is returning to the mantle • plates are slipping past each other • crust is not created or destroyed

  10. 2 oceanic plates or oceanic + continental subduction

  11. The Big Picture

  12. Key Terms for Map convergent boundary divergent boundary transform boundary subduction rift valley mid-ocean ridge continental crust oceanic crust mountain range earthquake

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