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Other Evidence for Evolution

Human Biology (Year 12)

Absolute Dating

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Ben Whitten

What is absolute dating?

Absolute dating methods enable us to give actual age to a fossil, artefact or rock (in years) – examples of absolute dating methods include carbon-14 dating, potassium-argon dating, and tree-ring dating.

Absolute dating methods depend on the regular repetition of any event, such as the decay of unstable nuclei to stable nuclei.

The proportion of a radioactive isotope in a sample of material can be measured, and by knowing the half-life of a particular radio-isotope, the sample's age can be worked out.

What is carbon-14 dating?

What is Potassium-argon dating?

What is dendrochronology?


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