Across
- 2. Fire ball earth
- 3. oxygen appears
- 6. corroded overtime
- 8. baby rocks
- 13. movement of crust via lava
- 14. layered effect of rock
- 15. movement of earth crust
- 17. hot liquid under the crust
- 18. heat and pressure outcome
Down
- 1. under the crust
- 3. force
- 4. cooled into rock formation
- 5. preserved remains of living thing
- 7. pressed and cemented
- 9. liquefied
- 10. the crust has cooled life has started
- 11. top layer
- 12. age of mammals
- 16. crack in the crust