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