Across
- 5. A scientists that studies fossil remains
- 7. A chronological scare of Earths history
- 9. Using index fossils to find the approximate age of a fossil
- 11. Reserved remains or traces of animals, plants, and other organisms
Down
- 1. Uses the decay of radioactive elements to find the absolute age of a rock/fossil
- 2. A scientists who studies the Earth's crust and the history of it
- 3. The predictable time an element takes to decay
- 4. The longest time chunk
- 6. A break in the earths crust that disrupts fossils strata
- 8. Used to correlate the age of rock strata
- 10. The smallest time chunk