Plate Tectonics Key Terms

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Across
  1. 4. the first layer of the earth
  2. 7. sliding against each other
  3. 9. ridge where new ocean floor is created as the Earth's tectonic plates spread apart
  4. 11. boundaries between plates
  5. 13. plate the thickest plate
  6. 14. going towards each other making contact
  7. 17. gigantic pieces of the Earth's crust and uppermost mantle
  8. 18. when one plate goes up and another goes down
  9. 20. the less densest layer
Down
  1. 1. area of rock that has been formed by stress
  2. 2. a area facturing between rocks and stress
  3. 3. plate the thinner plate
  4. 5. A deep depression in the ocean floor caused by the convergence of plates and the resulting subduction of one plate.
  5. 6. moving away from each other
  6. 8. a split between two bodies
  7. 10. the layer in the middle of the crust and outercore the liquid core
  8. 12. a long trough bounded by two or more faults.
  9. 15. gigantic pieces of the Earth's crust and uppermost mantle
  10. 16. the solid core
  11. 19. the center of the earth