Across
- 6. the depth at which the salt content changes
- 7. eats others
- 9. self-feeding
- 10. covers 75% of the Earth's surface
- 11. CO2 + H2O = C6H12O6 + O2
- 13. variety
- 15. measure of the salt content of water
- 16. inorganic ions necessary for life
Down
- 1. repeating process
- 2. cells using energy in food
- 3. the depth at which the temperature changes
- 4. living matter
- 5. plays an important role in an ecosystem
- 8. superheated water
- 12. deep-sea chimney
- 14. small, floating marine life