Radiocarbon dating means

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Radiocarbon dating

Carbon dating , also called radiocarbon dating , method of age determination that depends upon the decay to nitrogen of radiocarbon carbon Radiocarbon present in molecules of atmospheric carbon dioxide enters the biological carbon cycle : it is absorbed from the air by green plants and then passed on to animals through the food chain. Radiocarbon decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food. Once the organism dies, however, it ceases to absorb carbon, so that the amount of the radiocarbon in its tissues steadily decreases. Because carbon decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon. The carbon method was developed by the American physicist Willard F. Libby about It has proved to be a versatile technique of dating fossils and archaeological specimens from to 50, years old. The method is widely used by Pleistocene geologists, anthropologists, archaeologists, and investigators in related fields.

Related to radiocarbon dating: Potassium argon dating. A form of radiometric dating used to determine the age of organic remains in ancient objects, such as archaeological specimens, on the basis of the half-life of carbon and a comparison between the ratio of carbon to carbon in a sample of the remains to the known ratio in living organisms. Also called carbon dating , carbon dating. The 14 C decays to the nitrogen isotope 14 N with a half-life of years. Measurement of the amount of radioactive carbon remaining in the material thus gives an estimate of its age. Also called: carbon dating. A technique for measuring the age of organic remains based on the rate of decay of carbon

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How Does Carbon Dating Work

These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent. The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning. Definition and synonyms of carbon dating from the online English dictionary from Macmillan Education.