Week 18 plate tectonics

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Across
  1. 3. a long break in a body of rock or the crust of the earth.
  2. 8. layer of rock that makes up the outer part of the Earth, including the crust and upper mantle.
  3. 9. any one of the several large, separately moving sections of the Earth's surface that glide over the mantle.
  4. 10. When two tectonic plates moved toward each other.
Down
  1. 1. A thin layer of Earth, about 150 miles thick, between the mantle and the crust.
  2. 2. when two tectonic plates move away from each other.
  3. 4. when a more dense oceanic crust dives down beneath less dense continental crust
  4. 5. the layer of the Earth between the crust and the outer core.
  5. 6. the central part of a planet, especially the inner part of the Earth.
  6. 7. the rocky outer layer of a planet or moon; the layer of the Earth above the mantle.