Plate Tectonics

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Across
  1. 4. Outermost layer of the earth
  2. 5. The rigid, outermost shell of earth
  3. 8. The upper layer of the earths mantle
  4. 9. Type of excavation or depression in the ground
  5. 10. The central, spherical part of the earth below the mantle
  6. 12. Plates are moving away from one another
  7. 14. Movement in a gas or liquid in which the warmer parts move up and the cooler parts move down
  8. 15. A long, high sea wave
  9. 17. Supercontinent
  10. 18. The amount of force per unit of area that is put on a given material
  11. 19. An extended break in a body of rock
Down
  1. 1. A sudden and violent shaking of the ground
  2. 2. A squeezing force
  3. 3. A mountain or hill, typically conical, having a crater or vent
  4. 4. Plates that are moving toward one another
  5. 6. Sideways and downward movement of a plate beneath another plate
  6. 7. Drift Theory that all of earths continents were once joined together into a single landmass
  7. 11. Formulated the first complete statement of the continental drift hypothesis
  8. 13. Plates are sliding past one another
  9. 16. Layer between the crust and the core