Geologic Time Review

4. Fossils that show the link between past and present organisms.
8. A fossil that lived for a short period of time.
11. Similar structures in the body that related species have inherited from a common ancestor.
12. A diagram that shows how scientists think different organisms are related.
14. Four methods scientists use Fossils, Body structures, DNA, and ?
15. States that a layer of rock is younger than the layer under it and older than the layer above it.

1. Layers of rock.
2. Genetic information inside the cells of the body that has the instructions for how to make the body.
3. A species that passes down traits and DNA to related species.
5. Rocks made of loose eroded particles that harden over time.
6. The shapes and arrangement of the bones into a pattern of organization.
7. Remains of dead plants or animals.
9. The study of strata to determine the history of the land.
10. The purpose of something or a particular kind of work that it does.
13. Broken down pieces of rock that are moved from one place and deposited in another.