plate tectonics crossword

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Across
  1. 3. clue of continental drift
  2. 6. a number of rigid, but moving, pieces of the earths surface
  3. 8. plate _______
  4. 9. theory of the formation and movement of the plates that cover the earths surface
  5. 11. forms when two lithosphere plate come together
  6. 16. section of earth below the crust
  7. 17. alfred ______
  8. 18. forms when two lithospheric plates slide past each other
Down
  1. 1. the outer shell of earth that extends to a depth of 100km
  2. 2. the theory that all continents are fragments of pangaea now drifting apart
  3. 4. seafloor
  4. 5. the partially melted layer of the mantle that underlies the lithosphere
  5. 7. where new seafloor is created
  6. 10. outer most layer of earth
  7. 11. ______ drift
  8. 12. center of earth
  9. 13. layer of earth after inner core
  10. 14. forms when two lithospheric plates move apart
  11. 15. states that youngest rocks of ocean floor are at diverging boundaries, moving outward