Across
- 3. radioactive process
- 4. date determined using dendrochronology
- 7. one that is certain
- 8. artifacts found in rock or earth
- 9. past human life
- 11. dating breaks down easily
- 12. layers in tree
- 13. older or younger rock
- 14. Family tree of text
- 16. systematic study
- 17. rocks
- 19. preserved remains
- 20. phones
- 21. from the past
- 23. shows weather patterns in tree
- 24. human made object
Down
- 1. knowledge
- 2. asks two questions
- 5. does it contradict other
- 6. best dating method
- 10. useful knowledge
- 15. Scientific pursuits
- 18. agrees with self
- 22. Compare texts with copies