Across
- 2. organisms that live on, in, or near the seabed
- 3. middle layer of the ocean, receiving very little light
- 7. deep ocean layer where sunlight doesn't reach
- 8. aquatic animals that can swim and move freely of water currents
- 9. Deep, narrow depression on the ocean floor, often caused by tectonic activity
- 12. The extended perimeter of each continent
- 14. Flat, almost level area of the deep-ocean basin
- 15. the rising of cold, nutrient rich water from deep in the ocean to the surface
- 16. uppermost layer of the ocean where sunlight penetrates
- 17. deepest layer of the ocean found in trenches
- 19. Opening in the sea floor out of which heated mineral-rich water flows
- 20. layer of the ocean at depths between 4000 to 6000 meters
Down
- 1. a series of ocean waves with extremely long wavelengths caused by large scale disturbances
- 4. The steep slope where the continental shelf drops
- 5. the concentration of salts in water
- 6. small, microscopic organisms drifting or floating in the sea
- 10. Reef a diverse underwater ecosystem held together by calcium carbonate structures secreted by corals
- 11. Underwater Mountain range formed by plate tectonics
- 13. Layer in a body of water where the temperature changes rapidly with depth
- 18. Underwater mountain rising from the ocean floor that does not reach the surface