Earthquakes and Volcanoes- Tic Tac Know Plate Tectonics Project

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