Module 13-14.1 Review

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Across
  1. 5. use of rock layers above and below to determine age of fossil in between
  2. 7. triassic and jurrasic are examples of this division of geologic time
  3. 9. many eras of geologic time ended in this type of even
  4. 10. change in a species over time
  5. 14. longest of all time periods in Earth's history (90%)
  6. 15. use of radioactive elements to discover absolute age of rock
  7. 17. means current life and is the age of large mammals
  8. 18. means ancient life and saw the rise of biodiversity
  9. 19. current eon
Down
  1. 1. selection of one variation of a trait over another depends on the __________
  2. 2. the reason for evolution according to Darwin
  3. 3. trait that organisms of a population have that allows them to survive and reproduce
  4. 4. differences in organisms caused by mutations
  5. 6. paleozoic and cenozoic are examples of this division of geologic time
  6. 8. longest division of geologic time
  7. 11. principle of natural selection that states some variations will likely die
  8. 12. type of rock in which fossils are found
  9. 13. shortest division of geologic time
  10. 16. means middle life and was age of large reptiles