Geo term puzzle

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Across
  1. 1. a peice of land that is surrounded by water
  2. 3. steep sided glacial valley
  3. 6. a natural hot spring
  4. 7. the ________ creek sixth grade center
  5. 9. flat rolling land
  6. 11. large body of salt water
  7. 13. North America, Asia, and South America
  8. 15. a deep narrow valley with high steep walls
  9. 16. there's a big one on the border of the U.S. and Canada
  10. 18. a man made waterway
  11. 19. it is formed when a continental plate and a continental plate collide
  12. 21. a body of fresh water the is surrounded by land
  13. 22. A piece of land that is surrounded by water on three sides
  14. 24. something you hear
Down
  1. 2. cactuses grow here and it is very dry
  2. 4. densely over grown land
  3. 5. a piece of land the is surrounded by water on three sides
  4. 8. the center of a atoll
  5. 10. a group of mountains
  6. 12. the thing the titanic hit
  7. 14. vast treeless plains with small low plains
  8. 17. a hollow part of land that is under ground
  9. 19. a elevated land form that is flat at the top
  10. 20. a pei e of land the is slightly raised
  11. 23. a ring shaped island that was formed by coral
  12. 25. sand that got piled up