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is a way to figure out how old something is based on the fact that all things on Earth contain certain materials that change over time. Since they know exactly how fast one type of thing changes into another, they can figure out exactly how old things are based on the tiny atoms inside of them! Radioactive dating definition, any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived.
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Appendix Radioactive Dating The technique of comparing the abundance ratio of a radioactive isotope to a reference isotope to determine the age of a material is called radioactive dating. The isotope 14C, a radioactive form of carbon, is produced in the upper atmosphere by neutrons striking 14N nuclei. The isotope 14C is radioactive, and beta-decays with a half-life of 5, years.
The best estimate from this dating technique says the man lived between and BC. A potassium-argon method of dating, developed inmeasures the amount of 40Ar arising from the 40K decay and is compared to the amount of 40K remaining in the rock. The age of our galaxy and earth also can be estimated using radioactive dating.