Plate tectonics project crossword puzzle

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Across
  1. 3. a continuous range of undersea volcanic mountains
  2. 9. upper layer of earths mantle
  3. 11. when two tectonic plates move away from each other
  4. 12. third layer of earth
  5. 13. the theory that all plates used to be connected but drifted away from each other over time
  6. 14. when two plates come together
  7. 15. the process by which the North pole is transformed into a South pole and the South pole becomes a North pole
Down
  1. 1. drive the movement of Earth's rigid tectonic plates in the planet's fluid molten mantle (think hot)
  2. 2. outer most layer of earth
  3. 4. crust and upper most-solid mantle
  4. 5. second layer of earth
  5. 6. an intensely hot area in the mantle below Earth's crust
  6. 7. center of earth
  7. 8. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
  8. 10. places where plates slide sideways past each other