Unit 7: Geologic Time Vocab Practice

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epoch

Back

a division of geologic time less than a period and greater than an age

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Correlation

Back

a mutual relationship or connection between two or more things

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Erosion rate

Back

The rate at which the land is being eroded

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Deposition rate

Back

The rate at which the sediment is being deposited

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geologic time scale

Back

scale used by paleontologists to represent evolutionary time

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radiometric dating

Back

the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products

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half-life

Back

length of time required for half of the radioactive atoms in a sample to decay

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principle of fossil succession

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states that fossil organisms succeed one another in a definite and determinable order

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Radioactivity

Back

The process in which some substances spontaneously emit radiation

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era

Back

a large division of geologic time usually shorter than an eon