1. Sci. 3-4 Looking at Fossils Page 68-72

2. A. Fossil- any naturally preserved evidence of life.

3. 1) Fossils in rock- usually the hard parts are preserved

4. 2) Mineral replacement- minerals filled in the pores of an organisms tissue

5. 3) Fossils in Amber- insects falls in sap and it hardens into amber.

6. 4) Mummification- organism dies in a dry place and dry out fast so the tissues do not decay

7. 5) Frozen fossils- freezes in a glacier

8. 6) Fossils in tar- preserved in a tar pit

9. B. Trace Fossils- any naturally preserved evidence of an animal’s activity 1)track- foot print 2) burrows- shelter made by animals in the ground 3) coprolites- preserved feces or dung

10. 4) Mold and casts- mold is cavity in the ground or rock where an organism was buried. A cast is an object created when sediment fills the mold and becomes rock.

11. C.Fossils can tell scientists the following: 1)How earth’s environment has changed over time 2) how plants and animals have changed over time 3) how rocks have changed positions.

12. D.Index Fossil- are fossils of organisms that lived during a relatively short, well-defined time span. 1) These can help date rocks.