Fossils

Special fossils that indicate to geologists the boundaries of geological time.

• A. Index Fossils

• B. Trace Fossils

• C. Mold Fossils

• D. Cast Fossils

Which fossilization process leaves behind a dark film on a sedimentary rock?

• A. Petrification

• B. Replacement

• C. Carbonization

• D. Trace Fossil

Which type of fossilization occurs when a sticky substance from plants captures and preserves an organism?

• A. Permineralization

• B. Mold

• C. Fossil Resin

• D. Tar

What type of fossilization results when the whole animal is preserved?

• A. Carbonization

• B. Replacement

• C. Mold

• D. Ice/Freezing

Which type of rock and fossil dating gives the precise age of the rock or fossil?

• A. Geologic Time dating

• B. Absolute dating

• C. Relative dating

• D. Differential dating

*Describe the relationship between rocks and fossils found in the same or rock layer. *

• They are from different time periods

• They are from the same animals

• Usually the hard parts of organisms are fossilized such as teeth, bones and shells.

• Both of them are relatively the same age.

*What is a fossil? *

• Organs and soft tissue from past living organism

• Many different rock types found in layers of rock strata

• Preserved remains or traces of animals, plants, and other organism from the remote past.

*What parts of organisms become fossils?*

• Bones and teeth

• Organs

• Skin

• Usually the hard parts of organisms

• Shells

*What are 3 requirements for an organism to become fossil?*

• Quick burial of organism

• It has to be bones of the animal to be preserved

• Layers of sediments build up over the organism

• The traces of the organism have to be buried slowly

• Left for a long period of time

In what type of rock are fossils most commonly found?

• Sedimentary

• Metamorphic

• Igneous