Tyler crossword puzzle

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Across
  1. 4. used to detect whats under the ocean
  2. 5. magam rises and sinks back into the mantle
  3. 7. sloping area
  4. 10. measurement of dissolved solids
  5. 13. flat part of the ocean
  6. 15. one plate sliding under a plate
  7. 18. pengiuns swim
  8. 19. deepest part of the subduction zone
  9. 20. where the slope begins
Down
  1. 1. in south america
  2. 2. hills and valleys at the ridge
  3. 3. where the bottom of the ocean floor begins
  4. 6. chlorine salt in the ocean
  5. 8. magma rises from the mantle
  6. 9. in india
  7. 11. 2nd largest ocean
  8. 12. percentage of the solids
  9. 14. seamounts that are underwater
  10. 16. mountains under water
  11. 17. biggest ocean