Across
- 3. Wind-formed
- 4. All life on Earth
- 6. River-related
- 9. Deep ocean region
- 10. Shore-related
- 12. Ocean-related
- 15. Between tropical and temperate
- 17. Distinct ecological area
- 19. All Earth’s water
- 20. Cold-warm air boundary
Down
- 1. Ocean depth measurement
- 2. Landmass-related
- 5. Open ocean zone
- 7. Rising deep ocean water
- 8. Ice-related
- 11. Water temperature layer
- 13. Shore zone
- 14. Surface land features
- 16. Rock-related
- 18. Frozen water regions