Plate Tectonics and Earth's Structure Crossword Puzzle

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Across
  1. 4. theory that earth's outer shell is divided into several plates that glide over the mantle,the rocky inner layer above the core.The plates act like a hard and rigid shell compared to Earth's mantle.This strong outer layer is called lithosphere.
  2. 7. plates are dividing
  3. 8. layer that surrounds the core and is made mainly of silicon,oxygen,iron,and magnesium
  4. 10. sliding and lithosphere is neither formed nor destroyed
  5. 11. the man who came up with the theory of Continental Drift
  6. 13. transform boundary in United States
  7. 14. spreading new land/crust is being generated
  8. 16. Drift theory first proposed by scientist Alfred Wegener in 1912.
  9. 18. super continent that incorporated almost all the landmasses on Earth.
Down
  1. 1. two continental plates involved
  2. 2. hot,dense metals that sank, due to gravity, after the earth formed
  3. 3. movement that can occur along plate boundaries
  4. 5. currents in the mantle cause the plates to move
  5. 6. plates are sliding past one another
  6. 8. formation convergent and lithosphere is destroyed
  7. 9. thin,outermost layer that covers the planet and floats on the plastic mantle
  8. 12. United States mountain range created by collision of two continental plates
  9. 14. movement that can occur along plate boundaries
  10. 15. divergent and lithosphere is formed
  11. 17. movement that can occur along plate boundaries