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Geologic Time Scale

8th Earth Science

QuestionAnswer
The scientific study of origin, history, and structure of Earth and the processes that shape it. Geology
The principle that states that all geologic change occurs suddenly. catastrophism
An ordered arrangement of rock layers that is based on the relative ages of the rocks and in which the oldest rocks are at the bottom. Geologic Column
The standard method used to divide Earth's long natural history into manageable parts. Geologic Time Scale
A principle that geologic processes that occurred in the past can be explained by current geologic processes. Uniformitarianism
The history of life in the geologic past as indicated by the traces of remains of living things. Fossil Record
The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock. Fossil
The super-continent that formed 300 million years ago and that began to break up 200 million years ago. Pangaea
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