Across
- 2. convection
- 4. convergent
- 5. mesosphere
- 7. metamorphic
- 9. divergent
- 14. pangaea
- 15. population
- 16. faults
- 17. mountain
- 18. atmosphere
- 19. seismographs
Down
- 1. lithosphere
- 3. tectonicplate
- 6. sedimentary
- 8. igneous
- 10. sea-floor
- 11. rapid
- 12. gradual
- 13. volcanoes