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ch. 4 vocabulary

Science

TermDefinition
fossil traces or remains of living things from a long time ago
original remains actual body parts of a organism
ice core a tubular sample that shows the layers of snow and ice that has built up over thousands of years
relative ago the age of an event or object in relation to other events or objects
index fossils fossils or organisms that were common that lived in many areas and that existed only during specific spans
absolute age the actual age of an event or object
half-life the time taken for the radioactivity of a specified isotope to fall to half its original value
uniformitarianism the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes
geological time scale a system of chronological measurement that relates stratigraphy to time
Created by: TJ.Joy
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