Plate Tectonics

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Across
  1. 2. the supercontinent that existed millions of years ago
  2. 5. Current, the driving force of plate tectonics in which hot plastic like material sinks back to the mantle
  3. 7. breaks in Earth’s crust where rocks have slipped past each other
  4. 8. a deep valley in a wide area
  5. 10. any trace of an ancient organism that has been preserved in rock
  6. 13. part of the ocean floor sinks back into the mantle
  7. 15. created by two pieces of continental crust converging or coming together
  8. 17. continents were once joined together in a single landmass andhave slowly moved apart
  9. 18. Founded PANGEAE
  10. 19. the boundaries between two plates that are diverging
  11. 20. older strips or rock move outward from either side of the ridge
Down
  1. 1. the idea that the Earth’s crust and upper mantle are broken into sections called plates that move around on the mantle
  2. 3. the boundaries between two plates that are sliding
  3. 4. caused by plate tectonics
  4. 6. the crust and part of the upper mantle
  5. 9. the plastic-like layer below the lithosphere
  6. 11. all the continents were once joined together in a single landmass
  7. 12. the boundaries between two plates that are converging
  8. 14. major tectonic plates in pieces
  9. 16. ocean floor sinks beneath a deep-ocean trench and back into themantle again