Across
- 2. layer of the ocean at depths between 4,000 and 6,000 meters
- 3. layer in body of water where temperature changes rapidly with depth
- 5. The uppermost layer of the ocean where sunlight penetrates
- 6. The concentration of salts in water
- 8. rising of cold nutrient-rich water from deep in the ocean to the surface
- 9. diverse underwater ecosystem held together by calcium carbonate
- 10. Aquatic animals that can swim and move independently of water currents
- 11. An underwater mountain range formed by plate tectonics
- 14. The middle layer of the ocean receiving very little light
- 15. underwater mountain rising from the ocean floor
- 16. Small and microscopic organisms drifting or floating in the sea
- 18. series of ocean waves with extremely long wavelength
- 19. opening in the sea floor out which heated mineral-rich water flows
- 20. flat almost level area of the deep-ocean basin
Down
- 1. The deepest layer of the ocean found in ocean trenches
- 4. The deep ocean layer where no sunlight reaches
- 7. extended perimeter of each continent
- 12. Organisms that live on in or near the seabed
- 13. steep slope where continental shelf drops to the deep ocean floor
- 17. deep narrow depression in the ocean floor often caused tectonic activity