Restless Earth

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Across
  1. 5. Pangaea
  2. 6. Faults
  3. 8. Igneous
  4. 9. Sedimentary
  5. 10. Metamorphic
  6. 11. Trenches
  7. 14. Convergent
  8. 16. Volcanoes
  9. 18. Asthenosphere
  10. 19. Divergent
  11. 20. Mountains
Down
  1. 1. Gradual
  2. 2. Lithosphere
  3. 3. Population
  4. 4. Mesosphere
  5. 7. Seismographs
  6. 12. Convection
  7. 13. Sea-Floor
  8. 15. Tectonic
  9. 17. rapid