Plate tectonics

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Across
  1. 1. plates moving into each other but at different density
  2. 3. the boundaries in between different plates.
  3. 4. outer shell
  4. 9. most solid bulk of earths interior
  5. 10. it happens when two plates collide
  6. 12. plates moving toward each other
Down
  1. 2. outside of the inner core
  2. 5. the valley between the divergent plates
  3. 6. plates moving next to each other
  4. 7. hot melted rock from the inner mantle
  5. 8. in side of earths crust
  6. 11. plates moving away from each other