Across
- 2. marine life depends on this to survive
- 5. rivers of water in the ocean
- 7. caused by the moon's gravity
- 12. plant-like plankton
- 14. free-floating organisms that live in the water
- 15. covers the ocean floor
- 16. cause of surface currents
Down
- 1. animal-like plankton
- 3. deep flat plain of the ocean floor
- 4. part of the ocean floor you swim over
- 6. middle zone of the ocean
- 8. darkest and coldest ocean zone
- 9. warmest zone of the ocean
- 10. the amount of salt in ocean water
- 11. up and down movement of the ocean water
- 13. deepest part of the ocean floor