Across
- 2. Plates pulling apart
- 3. Stationary volcanic source
- 5. Fossil used for dating
- 6. Molten rock underground
- 8. Plates pushing together
- 12. Continental drift scientist
- 14. Earth's rocky outer layer
- 16. Plate sinks below another
- 17. Molten rock aboveground
- 20. Oldest layers on bottom
Down
- 1. Theory of plate movement
- 4. Rock containing fossils
- 7. Layer below the crust
- 9. Deepest ocean feature
- 10. Preserved ancient remains
- 11. Folded crustal uplift
- 13. Sudden crustal movement
- 15. Single giant landmass
- 18. Plates sliding past
- 19. Underwater mountain chain