Nathan's water system crossword puzzle

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Across
  1. 4. a large body of salt water
  2. 5. water that is drinkable (2 words)
  3. 8. the biggest ocean in the world (2 words)
  4. 11. a major lack of water in a area
  5. 12. like a ocean but smaller
  6. 13. a moving body of fresh water
  7. 14. artificial lake where water is stored
  8. 16. the smallest ocean in the world (2 words)
  9. 17. when a river flows into a still body of water
  10. 18. a overflow of water
  11. 19. a area where water runoff collects to one point (2 words)
Down
  1. 1. a underground layer of fresh or saline water
  2. 2. a bowl of water surrounded by land
  3. 3. 60% of the worlds fresh water is held here (3 words)
  4. 6. all water found on the surface, underground, and in the air
  5. 7. a moving landform made of dense ice or snow
  6. 9. the biggest drainage basin in the world (2 words)
  7. 10. one of the great lakes (2 words)
  8. 15. water that naturally has lots of salt in it