Theory of Plate Tectonics

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Across
  1. 2. type of crust made of basalt; thinner, more dense, younger
  2. 5. The crust and the upper part of the mantle
  3. 7. extra hot part of the mantle; forms a volcano in the middle of tectonic plate
  4. 9. occurs at divergent continental boundary
  5. 10. process that creates new ocean floor at mid-ocean ridges
  6. 11. boundary where plates are moving away from each other
  7. 13. The hot, plastic layer of the mantle; convection currents occur here
  8. 14. type of crust made of granite; thicker, denser, oldest
Down
  1. 1. occurs at a divergent oceanic boundary
  2. 3. boundary where plates are moving towards each other
  3. 4. type of convergent boundary; denser plate slips under the less dense plate
  4. 6. Drives plate movement on Earth's surface
  5. 8. a very deep underwater canyon; location of subduction
  6. 12. break in Earth's crust
  7. 15. boundary where plates slide past each other