Oceans Crossword Puzzle

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Across
  1. 3. A seafloor mountain system formed by plate tectonics
  2. 5. Process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge
  3. 7. The line along which a large body of water meets the land
  4. 8. A ridge of rock in the sea formed by the growth and deposit of coral
  5. 10. A steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures
  6. 12. A linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift
  7. 13. A type of excavation or in the ground that is generally deeper than it is wide
  8. 14. A raised mass of water on the surface of water, especially the sea, which is caused by the wind or by tides making the surface of the water rise and fall
  9. 17. A small watercraft designed to operate underwater
  10. 18. The slope between the outer edge of the continental shelf and the deep ocean floor
Down
  1. 1. The outer edge of continental crust abutting oceanic crust under coastal waters
  2. 2. Flat seafloor area at an abyssal depth
  3. 4. Low-relief zone of accumulated sediments that lies between the continental slope and the abyssal plain
  4. 6. An opening in the sea floor out of which heated mineral-rich water flows
  5. 9. A seamount with a flat top
  6. 11. The ocean floor in those parts of the oceans that are more than 2000 m deep
  7. 13. An elongate depression in the seafloor that is characteristically shallower, shorter, narrower, and topographically gentler than oceanic trenches
  8. 15. The top of a mountain or hill
  9. 16. A submarine mountain