Eartquake/Volcano Crossword puzzle

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Across
  1. 5. A theory explaining the structure of the earth
  2. 7. A scientist who first learned about and told the Theory of the Continental Drift in 1912
  3. 8. A soft layer of the mantle and where the lithosphere floats
  4. 9. A molten layer of iron and nickel surrounding the earth's inner core
  5. 13. A plate boundary that moves apart from each other
  6. 18. A landmass that broke apart 225 million years ago
  7. 19. What causes the tectonic plates to move through the lithosphere and the asthenosphere
Down
  1. 1. The process by which oceanic crust sinks beneath a trench and back into a convergent plate boundary
  2. 2. Alfred Wegener's theory that the Continents was once a huge landmass
  3. 3. The thickest layer of earth that consist of the lithosphere and the asthenosphere
  4. 4. A layer made up of part of the mantle and the crust
  5. 6. A plate boundary that hit each other, moving it in different directions
  6. 10. A plate boundary where two plates move together
  7. 11. Where molten material makes new ocean floor
  8. 12. A crack in the lithosphere which rocks move along
  9. 14. An underwater mountain chain where a divergent plate boundary creates new ocean floor
  10. 15. A deep and wide crack on the ocean floor
  11. 16. A deep valley where two plates move in opposite directions
  12. 17. A ball of solid material at the center of the earth
  13. 19. A layer that forms on the surface of the earth