Plate Tectonics Menu Appetizer

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Across
  1. 1. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  2. 4. the hot substance in the the core of the earth
  3. 7. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
  4. 9. pieces of Earth's crust and uppermost mantle, together referred to as the lithosphere.
  5. 11. when subduction Occurs in the oceanic crust it forms a
  6. 13. the movement of the divergent boundary
  7. 15. when to plates are colliding it forms what boundary
  8. 16. The earth was once one huge earth called
  9. 18. when two plates in the continental crust divide it forms a
Down
  1. 2. when two plates are sliding it forms what boundary
  2. 3. the movement of the transform boundary
  3. 5. when two plates are dividing it forms what boundary
  4. 6. when two plates in the oceanic crust divide it forms a
  5. 7. the movement of the convergent boundary
  6. 8. the uppermost layer of the oceanic portion of a tectonic plate.
  7. 10. the scientist who invented the continental drift theory
  8. 12. the theory that the earth was once one huge earth called Pangaea and then separated.
  9. 14. the theory that the earth sea floor spreads and generates new earth and gets rid of old earth
  10. 17. the scientist who invented the sea floor spreading theory