Plate tectonics

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Across
  1. 2. Core
  2. 5. boundaries 1
  3. 8. Layer
  4. 10. Crust
  5. 11. ranges boundaries
  6. 12. Mantel
  7. 13. Core
  8. 14. ocean trenches
  9. 15. valley
Down
  1. 1. boundaries 3
  2. 3. When one plate goes under another
  3. 4. boundaries 2
  4. 6. The edges where two plates meet
  5. 7. Layer
  6. 9. Mantel