Across
- 5. where feshwater river meets salty ocean
- 7. area of land that drains into a river basin
- 8. indicate the health of an ecosystem
- 9. a body of water stored for human use
Down
- 1. fish farming
- 2. chlorinating water
- 3. water can flow through it
- 4. organisms on the ocean floor
- 6. how salty the water is
- 10. saltiness of water