Oceanography

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Across
  1. 3. An underwater mountain range formed by plate tectonics.
  2. 4. Shelf The extended perimeter of each continent, which lies submerged
  3. 5. A flat, almost level area of the deep-ocean basin
Down
  1. 1. Slope The steep slope where the continental shelf drops to the deep
  2. 2. A deep, narrow depression in the ocean floor, often caused by tectonic activity