Ocean thing

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Across
  1. 3. hill with a vent through witch lava escapes from
  2. 4. spring that throws forth jets of hot water and steam
  3. 7. ring shaped reef formed from coral
  4. 8. large body of ice moving slowly down a slope
  5. 9. the movement of water from one location to another
  6. 10. the alternate rising and falling of the sea
  7. 12. large point of land extending into the water
  8. 14. a ridge of material at or near the surface of the ocean
  9. 15. steep hill that is flat on top
  10. 16. fast flowing and agitated part of a river
  11. 17. large underground chamber
  12. 18. the stuff you put in a car
Down
  1. 1. move to a different place
  2. 2. Word Mrs. M's friend pronounced the wrong way
  3. 3. low area of land between hills or mountains
  4. 5. things that make toys
  5. 6. the state of the atmosphere
  6. 11. water falling from a height
  7. 13. The cold thing
  8. 15. A water animal that is a primary colour