Alfred Wegner isn't he dead

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Across
  1. 5. when one plate goes over the other plate
  2. 8. when things heat up they get less dense resulting in a ________ current
  3. 9. when two plates rub against each other
  4. 10. why do the continents drift
  5. 11. what happens at a convergent boundary
  6. 12. who came up with continental drift
Down
  1. 1. the largest rodent
  2. 2. when two plates move in opposite directions
  3. 3. dill _______
  4. 4. a sequence of things in between two of the same thing
  5. 6. Alfred Wengner's theory
  6. 7. depending on how loosely or tightly Adams are packed this varies