Evolution Crossword

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Across
  1. 6. the theory that species evolve during short periods of rapid change
  2. 7. a way to determine when an organism was around in time
  3. 12. a well-tested concept that explains a wide range of observations
  4. 13. a record of millions of fossils collected by scientist
  5. 14. changing your way of life to better live in your environment
  6. 15. when the population of a species is too big
Down
  1. 1. similar body parts across different species; provide evidence for common ancestor
  2. 2. survival of the fittest
  3. 3. the last shared common ancestor on the branching tree of evolution
  4. 4. a structure that is reduced in size and has little to no function
  5. 5. a scientist that proposed all organisms goal of life is to evolve and adapt
  6. 8. idea that over time older species evolved into new species
  7. 9. change in the genetic material of a cell
  8. 10. how well organisms can survive and reproduce in its environment
  9. 11. the theory that evolution occurs slowly but steadily