1. Question How do you think fossils form?
What do you think that fossils tell us?

2. Fossils Are preserved remains or traces of living things.
Provide evidence of how life has changed over time.

3. How fossils form
Most form when living things die and are buried by sediments
Sediments slowly harden into rock and preserve the shapes of the organisms

4. Sedimentary rock Fossils usually found in this
Rock is made of hardened sediment.

5. Found
Animals and plants that lived in or near quiet water such as swamps, lakes, or shallow seas turn into fossils.
Dies = hardens and only hard parts leave fossils

6. Found
Fossils found in rock include molds and casts, petrified fossils, carbon films, and trace fossils.
Others preserved in tar, amber or ice

7. Mold
Is a hollow area in sediment in the shape of an organism or part of an organism
Forms when hard part such as a shell is buried in sediment

8. Cast
Fossil that is a copy of an organisms shape formed when minerals seep into a mold

9. Petrified fossils
Are fossils in which minerals replace all or part of an organism

10. Carbon film
Extremely thin coating of carbon on rock

11. Trace fossils Provide evidence of the activities of ancient organisms.
Ex. fossil footprints, trails, and burrows

12. Paleontologists
Collect and classify fossils

13. Fossil record Provides evidence about the history of life on earth
Shows that groups of organisms have changed over time
Shows fossils occur in a particular order

14. Scientific theory
Well tested concept that explains a wide range of observations

15. evolution
Is the gradual change in living things over long periods of time
Fossil record shows millions of type of organisms have evolved.

16. Extinct
No longer exists and will never live on earth again