Plate Tonics & Continental Drift Theory

Edit Answers
123456789101112131415161718
Across
  1. 1. the thin outer surface of the Earth
  2. 5. seven great land masses on the globe
  3. 6. this happens when the Earth's crust buckles in a wavelike pattern, creating hills or mountains
  4. 8. the innermost layer of the earth
  5. 9. the layer of earth on which the crust floats
  6. 12. portion of the Earth's crust that lies beneath the ocean floor
  7. 14. a German scientist that developed the theory of continental drift. He did not have any proof although he based his theory on the fact that the continents looked like pieces of a puzzle that fit together
  8. 16. hot, less dense material below Earth's crust rises toward the surface at the mid-ocean ridge
  9. 18. a break in the earth's crust where earthquakes can happen
Down
  1. 2. this is a large wave caused by earthquakes
  2. 3. current in Earth's mantle that transfers heat in Earth's interior and is the driving force for plate tectonics
  3. 4. all land
  4. 5. continents moved slowly to their current location
  5. 7. to come together
  6. 10. rigid layer of Earths crust and a part of the upper mantle
  7. 11. to move apart
  8. 13. move on a plasticlike layer of the mantle
  9. 15. Earth's crust and part of the upper mantle are broken into sections
  10. 16. when denser rock is pushed down into the mantle so that it melts back into magma
  11. 17. plastic layer of earth on which the lithospheric plates float and move around