the boundaries crossword puzzle

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Across
  1. 2. its in the ocean
  2. 4. come together
  3. 5. created by tectonic plate rise or fold
  4. 6. its a underwater mountain range
  5. 8. split apart
  6. 9. its in-between mountains or rivers
Down
  1. 1. slide past eachother
  2. 3. a type of soil
  3. 6. above the outer core and below the crust
  4. 7. it split or breaks