1. Evidence for Evolution- The Record of Life
Fossils-trace of a long-dead organism
formed in layers of sedimentary rock
usually develop from hard body parts of an organism
*Robert Hooke concluded that fossils were remains of plants and animals

2. Paleontologists Study ancient life
Learn about behavior, ancient climate and geography
Formation
Organism is buried in mud, sand, or clay
Particles are compressed
Hardens into sedimentary rock

3. Trace Fossils
footprints, feeding marks

4. Casts Minerals in rocks fill a space left by a decayed organism
A replica

5. Molds
Organism is buried in sediment and decays, leaving an empty space

6. Petrified Fossils
Minerals penetrate and replace the hard parts of an organism

7. Amber or Frozen Fossils
Organism is trapped in ice or tree sap and hardened into amber

8. Fossils Cont.
Relative age -the age of a fossil in comparison to the age of another fossil
Absolute age -age in years of a fossil

9. Extinctions 95% of the species that have existed are extinct!
Careers-paleontologists and biogeography
Five mass extinctions?-maybe six? One now?