Tic Tac Know project

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Across
  1. 5. Theory that pieces of the Earth's lithosphere are in motion,driven by convection currents in the mantle
  2. 7. Thickest layer of the Earth; it consists of two layers - the lithosphere and the asthenosphere
  3. 8. A layer of molten iron and nickel that surrounds the inner core of the Earth
  4. 9. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
  5. 12. A plate boundary where two plates grind against each other, moving it different directions
  6. 13. A deep valley where two plates move apart
  7. 14. The process by which molten material adds new oceanic crust to the ocean floor
  8. 15. The layer of rock that forms the Earth's outer surface
Down
  1. 1. A plate boundary where two plates move away from each other
  2. 2. The undersea mountain mountain chain where new ocean floor is produced; a divergent plate boundary
  3. 3. A deep canyon on the ocean floor
  4. 4. German Scientist who developed the Theory of the Continental Drift in 1912.
  5. 6. a break or crack in the Earth's lithosphere along which rocks move
  6. 10. Dense ball of solid material at the center of the Earth
  7. 11. A plate boundary where two plates move toward each other