Across
- 1. metamorphic, igneous, sedimentary
- 4. fossil formed when sediment fills inside
- 5. Fossilized remains of the actual organism
- 6. Events in chronological order
- 8. condensation, evaporation, precipitation
- 9. Substance hardens into rock on a fossil
- 11. specific number of years on an event
- 14. two or more types of atoms
Down
- 2. Strata
- 3. preserved remains
- 7. an orderly classification system
- 10. radioactive energy and begins to breakdown into a different element
- 12. Fossilized footprints
- 13. Field of study