Billie Daniels

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Across
  1. 3. /the deeper in the earths crust you find a fossil the ___ they are
  2. 6. /a change or difference.
  3. 7. darwin studied their beaks
  4. 8. /natural selection is also about this.
  5. 9. where Darwin went on his voyage.
  6. 14. /a characteristic belonging to someone
  7. 15. /the record of once-living organisms ______
  8. 17. /changes must happen over __________ years.
  9. 18. /time that determines the order or sequence of when events happened.
  10. 19. remain or imprints of a once-living organism
Down
  1. 1. /helps an organism survive and reproduce in its environment.
  2. 2. /states rock layers farther from the surface are younger.
  3. 4. /darwin discovered this.
  4. 5. / gradual change in traits by nature.
  5. 10. / over the past 20,000 years,dogs have been ____ to produce different dog breeds.
  6. 11. /breeding with selective traits.
  7. 12. /passed down from generation to generation.
  8. 13. /all of the people born/living at the same time.
  9. 16. /change in genes.