Earthquakes and Volcanoes- Tic Tac Know Plate Tectonics Project

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Across
  1. 3. A break or crack in the Earth's lithosphere along which rocks move
  2. 5. The name of the single landmass that broke apart about 225 million years ago
  3. 7. The layer of rock that forms the Earth's outer surface
  4. 10. deep canyon on the ocean floor
  5. 11. A soft layer of the mantle on which the lithosphere floats
  6. 12. Thickest layer of the Earth; it consists of two layers-the lithosphere and the asthenosphere
  7. 13. A layer of molten iron and nickel that surrounds the inner core of the Earth
  8. 14. German Scientist who developed the Theory of the Continental Drift in 1912
  9. 15. The undersea mountain mountain chain where new ocean floor is produced; a divergent plate boundary
  10. 16. Dense ball of solid material at the center of he Earth
Down
  1. 1. Alfred Wegener's hypothesis that the continents were once one huge land mass but have since then drifted apart
  2. 2. The process by which molten material adds new oceanic crust to the ocean floor
  3. 4. Theory that pieces of the Earth's lithosphere are in motion,driven by convection currents in the mantle
  4. 6. A plate boundary where two plates grind against each other, moving it different directions
  5. 8. A deep valley where two plates move apart(2 words)
  6. 9. A rigid layer made up of the uppermost part of the mantle and the crust