Watersheds

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Across
  1. 5. a piece of land surrounded by water
  2. 6. underground lakes and rivers ex: aquifer
  3. 8. medium to large collection of non-moving surface water
  4. 12. anything introduced that does harm
  5. 13. where a river begins, usually in the mountains
  6. 16. small collection of non-moving surface water
  7. 17. green belt ono sides of tributaries. many plants and animals
  8. 18. largest flow of water emptying into a lake or ocean, many tributaries
Down
  1. 1. when salt and fresh water mix
  2. 2. where 2 tributaries merge
  3. 3. when contaminant is introduced in large quantities
  4. 4. entire geographical area drained by a major river and its tributaries
  5. 7. moving across Earth's surface and will sometimes pool
  6. 9. the place where all the water eventually drains into
  7. 10. area of land that drains into a common body of water
  8. 11. smallest flow of water that merges with rivers
  9. 14. runs into larger body of water ex. Mississippi river to Gulf of America
  10. 15. where a river meets a lake or ocean