Science

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Across
  1. 1. The layer of rock that forms the Earth's outer surface
  2. 2. A deep canyon on the ocean floor
  3. 4. Wagner German Scientist who developed the Theory of the Continental Drift in 1912.
  4. 6. A soft layer of the mantle on which the lithosphere floats
  5. 8. boundary A plate boundary where two plates move away from each other
  6. 9. A rigid layer made up of the uppermost part of the mantle and the crust
Down
  1. 1. boundary A plate boundary where two plates move toward each other
  2. 3. valley A deep valley where two plates move apart
  3. 5. A break or crack in the Earth's lithosphere along which rocks move
  4. 7. boundary A plate boundary where two plates grind against each other, moving in different directions
  5. 10. zone The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary