Ch. 14 Vocab.

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Across
  1. 4. Unrelated species evolved similar traits even though they live in different parts of the world
  2. 5. Ancestors of most major animal groups diverse
  3. 6. The ancestors of eukaryotic cells live in association with prokaryotic cells
  4. 7. States that only living organisms can produce other living organisms
  5. 9. Smallest units of geologic time
  6. 11. Younger layers of rock are deposited on top of older layers
  7. 15. First period of the cenozoic period
  8. 17. Largest unti of time
  9. 18. Unti of geologic time consisting of two or more periods
  10. 19. Can occur in a relativel short time when one species gives rise to many species in response to the creation of a new habitat or another ecological opportunity
Down
  1. 1. Amount of time it takes for a half of the original isotope to decay
  2. 2. Idea that life arises from non-life
  3. 3. A method used to determine the age of rocks by comparing them to those of other layers
  4. 8. Record of Earth's history
  5. 10. Uses the decay of radioactive isotopes to measure the age of a rock
  6. 12. Any preserved evidence of an organism
  7. 13. Describes the movement of several large plates that makes up the surface of the Earth
  8. 14. Divisions of geologic time consulting of two or more epochs
  9. 16. Scientists that study fossils