Across
- 1. type of fossil dating using rock layers above and below to determine age of fossil
- 4. preserved remains, or traces of remains, of ancient organisms
- 5. a genetically determined characteristic or condition (ex: color of fur)
- 7. also called numerical dating which uses volcanic ash to determine the age of fossil
- 9. the change of inheritable characteristics of a population over many generations
Down
- 2. explains why something occurs
- 3. complete disappearance of a species from Earth
- 6. species or organisms alive in the past that others are descended from
- 8. predicts an outcome