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Science Vocab

Chapter 4-Views of Earth's Past

TermDefinition
Fossils Traces or remains of living things 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 over thousands of years
Relative Age The age of an event or object in relation to other events or objects
Index Fossils Fossils of organisms that were common, that lived in many areas, and that existed only during specific spans of time
Absolute Age The actual age of an event or object
Half-Life The length of time it takes for half of the atoms in a sample of a radioactive element to change from an unstable form into another form
Uniformitarianism The idea that Earth is an always changing place and that the same forces of change at work today were at work in the past
Geologic Time Scale A chart that divides history into intervals or time defined by major events or changes on Earth
Created by: nicholas.surovi
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