Earth's Interior and Continental Drift Review

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Across
  1. 3. the _____ core is under extreme pressure which keeps it in a solid state
  2. 4. most of the Earth's ocean crust is made up of this rock
  3. 7. protection from solar _____ is the greatest benefit of Earth's magnetic field
  4. 11. the force that pulled small rock particles together to eventually form planet Earth
  5. 14. the rocky outer most layer of the Earth
  6. 15. _____ from space help in our understanding of the composition of Earth's layers
  7. 16. the core is made up mostly of nickel and _____
  8. 17. matching plant and animal _____ provide evidence for the idea of continental drift
  9. 18. _____ decay has generated much of the internal heat of the Earth
Down
  1. 1. the name of the supercontinent that existed 250 million years ago
  2. 2. the average _____ of the Earth is about 5.5g/cc
  3. 5. the rock type formed from small pieces of rock called sediment
  4. 6. the type of rock formed from the changing of another type due to great heat and pressure
  5. 8. density, pressure, and temperature all _____ the deeper you go into the Earth
  6. 9. the scientist who first proposed the continents could move horizontally
  7. 10. the liquid outer core is constantly in motion, producing Earth's magnetic field
  8. 12. type of rock formed from the cooling of molten rock
  9. 13. these waves have helped us learn about Earth's internal structure