oceanography

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