Ocean Trenches/Mariana Trench

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Across
  1. 5. Trench, deepest part of the world's oceans
  2. 6. Trench, long narrow depression on the sea floor
  3. 9. Zone deepest zone of the ocean
  4. 11. Slope, continental side of an ocean trench
Down
  1. 1. Slope, oceanic side of an ocean trench
  2. 2. small submarine used to research and explore
  3. 3. Cameron, scientist involved in an unmanned expedition to the bottom of the Marian Trench
  4. 4. one of a kind
  5. 7. deep opening in the earth's surface
  6. 8. dip or depression in the surface of the ocean floor
  7. 10. Ocean, ocean where Mariana Trench is located