Tectonic Plates

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Across
  1. 3. Deep valley at sub'd zone
  2. 8. Violent release->magma, gas, rock
  3. 10. Molten rock
  4. 11. Site of diverging plates
  5. 14. Where one plate is sinking
  6. 19. Mountains lining rift valley
  7. 20. Crack in rock caused by moving crust
Down
  1. 1. Alfred Wegener’s theory
  2. 2. Upper mantle plus the crust
  3. 4. plate boundary -> earthquakes
  4. 5. Thick crust above sea level
  5. 6. crust can be equal in ___
  6. 7. Means to move apart
  7. 9. Molten rock on the surface of Earth
  8. 12. Layer below lithosphere
  9. 13. String of volcanos
  10. 15. Oros and genesis + mountains
  11. 16. Crust underneath the oceans
  12. 17. Means to separate
  13. 18. Evidence of ancient life