Module 7 - Science 8

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Across
  1. 2. the study of gene structure and function
  2. 3. body parts that have lost their original function through evolution
  3. 5. a _____ fossil is the preserved evidence of the activity of an organism
  4. 10. body parts that perform a similar function but differ in structure
  5. 12. the process that forms a fossil when a dead plant or animal is subjected to pressure over time forming a carbon outline
  6. 14. process that forms fossils when minerals in water take the place of an dead organism's original material
  7. 15. a fossil copy of an organism in a rock
  8. 17. the study of similarities and differences among structures of different species
  9. 18. _______ dating is determining the exact age in years of something using the method of radioactive decay
Down
  1. 1. body parts of organisms that are similar in structure and position but different in function
  2. 4. fossils that have characteristics of both ancestral organisms and organisms that evolved later
  3. 6. occurs when the last individual organism of a species dies
  4. 7. _______ dating is a method of determining an approximate age of something by comparing it to other things and determining the order in which they formed
  5. 8. a rare type of fossil where the actual parts of an organism are presreved in ice, tar pits, bogs, or amber
  6. 9. all the fossils ever discovered on Earth
  7. 11. the fossilized impression of an organism in a rock
  8. 13. the science of the development of embryos from fertilization to birth
  9. 16. a chart that divides Earth's history into different time units