Rock Record - compilation of all of Earth's known rocks, Fossil Record - compilation of all of Earth's known fossils, Relative Dating - any method of determining whether something is older or younger than something else, Geologic Time Scale - is used to organize Earth's long history into manageable parts, Division of Time - Eons, eras, periods & epochs, Absolute Dating - measuring the age of an object in years using any method, Geology - the scientific study of the history of Earth & the processes that shape it, Index Fossil - remains of an organism that was common & widespread.,

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