Fossils Vocab

3. The impression of an organism in a rock.
4. Variation or differences among life forms.
7. Principle that states that the oldest rocks are on the bottom layers and younger rocks are on the top layers have been undisturbed.
8. Structure that the Body parts of organisms perform a similar function but differ in structure.
10. An event that occurs when the last individual organism of a species dies.
12. A fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits.
13. _________ Evolution The change over time in populations of related organisms.
14. _________ Anatomy The study of similarities and differences among structures of living species.
15. Fossils of species that existed for a short time and can be used to date rocks.
16. The preserved evidence of the activity of an organism.

1. Structure that the Body parts of organisms are similar in structure and position, but are different in function.
2. Organisms that appear to be similar to species only known from fossils.
5. Record of all the fossils ever discovered on Earth.
6. Remains, impressions, tracks or other evidence of ancient organisms.
9. Structure that the Body parts of organisms have lost its original function through evolution.
11. The science of the development of embryos from fertilization to birth.