Evolution Crossword

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Across
  1. 3. The scientific name for the human species.
  2. 5. Darwin's theory of evolution.
  3. 7. proposed the first theory of evolution.
  4. 9. ________ dating is where scientists age fossils based off how much radioactive elements are found in them.
  5. 11. Characteristics that help an organism survive.
  6. 12. a slow gradual change
  7. 14. ________ dating is where scientists age fossils based off how deep they can be found in the earth.
  8. 15. ________ evolution occurs between unrelated species.
  9. 16. Survival of the ________ describes hwo some variations make organisms better able to survive.
Down
  1. 1. When organisms evolve in response to each other.
  2. 2. Chance events that can affect the gene pool.
  3. 4. The islands Darwin sailed to.
  4. 6. ________ time scale is a record of Earth's history.
  5. 8. Differences among members of a species.
  6. 10. ________ evolution occurs between members of the same species.
  7. 13. The name of the ship Charles Darwin sailed on.