Tectonic plates

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Across
  1. 2. ridge most extensive chain of mountains.
  2. 4. steep depressions in the ocean.
  3. 7. plates moving away from each other.
  4. 8. one with greater density goes underneath.
  5. 10. molten rock.
Down
  1. 1. plates moving towards each other.
  2. 3. caused by divergent boundaries.
  3. 5. valleys occur at divergent boundaries.
  4. 6. two plates slide past each other.
  5. 9. cause by converging boundaries.