Aquatic Ecosystems

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Across
  1. 1. vary in size
  2. 3. water ecosystem
  3. 5. surface of the sea floor
  4. 7. deep, deep in darkness
  5. 10. high tides and low tides
  6. 12. soil as a filter
  7. 13. fresh meets salty
Down
  1. 1. shines bright for photosynthesis
  2. 2. only 3% of water in the world
  3. 4. shallow with sunlight
  4. 6. high levels of salt
  5. 8. living interacting with environment
  6. 9. one direction
  7. 11. rivers keep coming