1. Earth Science Grade 8

2. Animal Dies Scavengers eat most of the flesh Bacteria eats away at the rest Sediments cover the remains Groundwater starts to filter through Rock is deposited into the bones one cell at a time. A fossil is made!

3. Eat away the flesh Eats the rest (groundwater) passes through Cover the remains Change to sediments Replaces the bone cells

5. Once living material or traces of living material that has become preserved in rock

6. Minerals fill in the space held by the original substance Examples: trees, bones, shells

7. When leaves or soft bodies materials buried Examples: film of carbon left behind

8. Hole left behind when groundwater dissolves a shell or bone Cast When minerals fill in the mold

9. Fossils that show how the organism lived Examples: footprints, tail marks, eggs, nests, burrows

11. Borrows

12. Nest of Eggs

13. Used to show specific units of time The best index fossils lived for a short period, but were wide spread