Plate motion

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Across
  1. 4. – Crack where movement occurs
  2. 6. – Ancient supercontinent
  3. 8. – Semi-fluid layer below lithosphere
  4. 10. – Earth’s innermost layer
  5. 11. – Earth's outer shell
  6. 12. – One plate sinks below another
  7. 17. – Mid-ocean mountain chain
  8. 19. – Plates sliding past
  9. 20. – Plates moving together
Down
  1. 1. – Molten rock below surface
  2. 2. – Moving slab of lithosphere
  3. 3. – Layer beneath the crust
  4. 5. – Rigid outer part of Earth
  5. 7. – Erupting mountain
  6. 9. – Heat-driven mantle motion
  7. 13. – Plates moving apart
  8. 14. – Deep ocean valley
  9. 15. – Oceanic crust surface
  10. 16. – Edge between two plates
  11. 18. – Ground shaking from movement