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