Earth Science Plate Tectonics

Card Set Information

Earth Science Plate Tectonics
2011-05-14 17:24:08
Plate Tectonics Boundaries Earth Science MoonRacer

Review of Plate Tectonics from Earth Science.
Show Answers:

  1. What is a Convergent Boundary?
    Also known as a subduction zone. Oceanic crust subducts beneath the continental crust and create trenches. Cause large Earthquakes. When continental plates collide, they fold and mountains build.
  2. What is a Divergent Boundary?
    Occur in mid ocean ridges/rises. When 2 plates seperate. New magma seeps up to fill he open space between the plates.
  3. What is a transform boundary?
    Where the boundaries slide against each other. Forming faults.
  4. Convection moves plates (at very slow speeds)
  5. Heat that escapes the earth's core causes convection. Where it is stable and stationary, it forms a ____.
    Hot spot.
  6. Volcanoes form along _______ and at ______
    They form along plate boundaries and at hot spots. The volcano goes extinct as it moves off of the hot spot.
  7. Faults are weaknesses in between rocks. When plates move against fault lines ____________.
    Earthquakes occur.
  8. The epicenter is the point at the surface above the ____.
    Focus. It is wheere the most damage occurs.
  9. Focus
    Point underground where the rocks slip and cause an earthquake.
  10. Earth produces 2 main waves. They are _______
    P waves and S waves.
  11. P waves
    • Fast
    • Go through liquid
    • Straight
  12. S waves
    • Can't travel through liquid, or the center of the Earth. Therefore, Earth's outer core is a liquid.
    • Slow
    • Side winding
  13. Shadow Zones
    Area where no seismic waves are felt.
  14. Moho
    Where the crust and mantle meet. Where seismic waves change speed.
  15. Tsunamis
    Giant ocean waves from underwater earthquakes.
  16. Know how to use the P wave and S wavee chart in the Refence Tables!!!! HHUUGGEE!!