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Fossil Traces or remains of living things from long ago.
Original Remains Fossils that are the actual bodies or body parts of organisms.
Ice Core A tubular sample that shows the layers of snow and ice that have built up for thousands of years.
Relative Age The age of an event or object in relation to other eventsor objects
Index Fossil Fossils of organisms that were common, that lived in many ares, and that existed only during specific spans of time.
Absolute Age The acual age of an event or object.
Half-Life The legnth of time it taked for half of the atomes in a sample of a radioactive element to change from an unstable form into another form.
Uniformitarianism The same process that change Earthin the past continue to occur today
Geological Time Scale the devision of earths history into intervals of time devined by major events or changes on earth
Created by: GavinSrodawa