Earthquakes and Volcanoes

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Across
  1. 3. A rigid layer made up of the uppermost part of the mantle and the crust
  2. 8. A soft layer of the mantle on which the lithosphere floats
  3. 9. A layer of molten iron and nickel that surrounds the inner core of the Earth
  4. 10. The name of the single landmass that broke apart about 225 million years ago
  5. 11. A deep canyon on the ocean floor
  6. 12. A plate boundary where two plates move away from each other
  7. 13. A break or crack in the Earth's lithosphere along which rocks move
  8. 14. Cause the plates to move; between the lithosphere and the asthenosphere
  9. 15. Dense ball of solid material at the center of the Earth
Down
  1. 1. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
  2. 2. A plate boundary where two plates grind against each other, moving in different directions
  3. 4. A deep valley where two plates move apart
  4. 5. Thickest layer of the Earth; it consists of two layers - the lithosphere and the asthenosphere
  5. 6. Alfred Wegener's hypothesis that the continents were once one huge landmass but have since then drifted apart
  6. 7. A plate boundary where two plates move toward each other