Across
- 5. The extended perimeter of each continent, which lies
- 7. flows.
- 9. Zone The uppermost layer of the ocean, where sunlight penetrates.
- 11. Aquatic animals that can swim and move independently of water currents.
- 12. A deep, narrow depression in the ocean floor, often caused by tectonic
- 13. underwater mountain range formed by plate tectonics.
- 16. An underwater mountain rising from the ocean floor that does not reach
- 17. An opening in the sea floor out of which heated mineral-rich
- 18. The rising of cold, nutrient-rich water from deep in the ocean to the
- 19. Reef A diverse underwater ecosystem held together by calcium carbonate
- 21. Zone The middle layer of the ocean, receiving very little light.
- 23. A flat, almost level area of the deep-ocean basin.
Down
- 1. secreted by corals.
- 2. A layer in a body of water where the temperature changes rapidly with
- 3. floor.
- 4. Zone The deepest layer of the ocean, found in ocean trenches.
- 6. under relatively shallow seas.
- 8. A series of ocean waves with extremely long wavelengths caused by
- 10. The steep slope where the continental shelf drops to the deep
- 12. surface.
- 14. Zone The layer of the ocean at depths between 4,000 and 6,000
- 15. Zone The deep ocean layer, where no sunlight reaches.
- 20. The concentration of salts in water.
- 22. Small and microscopic organisms drifting or floating in the sea.
- 24. Organisms that live on, in, or near the seabed.