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Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
Plate tectonics with vocabulary
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Plate tectonics with vocabulary

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  • 1. VOCABULARY
  • 2. plate tectonics- theory that continents are in slow, constant motion.
  • 3. continents- huge land masses
  • 4. Continental Drift- the theory that the continents were once a single land mass and have broken apart and “floated” to where they are today
  • 5. Alfred Wegener- German geologist who first came up with the Continental Drift theory in 1915
  • 6. Pangaea- name that Wegener gave to the land mass known as the Supercontinent
  • 7. Mid-ocean ridge- the longest mountain chain in the world
  • 8. Sea-floor spreading- At the mid-ocean ridge, molten material rises from the mantle, then spreads out, pushing older rock to both sides of the ridge. This process, called sea-floor spreading, forms the new ocean floor.
  • 9. magma- molten mixture of rock-forming substances, gases, and water that make up the earth’s mantle
  • 10. lava- magma that has reached the surface; also the rock that’s formed when the liquid lava hardens
  • 11. volcano a weak spot in the crust where magma has come to the surface Video http://www.cbsnews.com/video/watch/? id=7389841n&tag=mncol;lst;10
  • 12. fault- a break in rock where the rocks slide past each other; a break in the earth’s crust; earthquakes occur along faults
  • 13. earthquake- the shaking that results from the movement of rock beneath the earth’s surfacehttp://video.nationalgeographic.com/video/play er/environment/environment-natural- disasters/earthquakes/earthquake-101.html
  • 14. uplift- the raising of the earth’s crust; usually results in mountain formation
  • 15. intrusion- molten rock that has squeezed into existing rock and hardened Intrusion of mafic rock into granite
  • 16. subduction- process by which the ocean floor sinks back into the mantlehttp://oregonstate.edu/media/trcnb-hiq
  • 17. rift valley- a deep valley that forms where two plates move apart

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