Radiocarbon datingalso known as the C14 dating methodis a way of telling how old an object is. It is a type of radiometric dating. The method uses the radioactive isotope carbon Most organic matter contains carbon. Carbon has different isotopeswhich Radiocarbon dating method definition wikipedia usually not radioactive. This makes it possible to tell the age of substances that contain carbon.
The method works to about 60, years old. Dates obtained are usually written as before present 'present' is Plants take up atmospheric carbon dioxide by photosynthesisand are eaten by animals, so every living thing is constantly exchanging carbon with its environment as long as it lives. Once it dies, however, this exchange stops.
In Hessel de Vries showed that the Radiocarbon dating method definition wikipedia of carbon in the atmosphere varies with time and locality.
The relatively short-lived 14 C is constantly renewed by cosmic ray bombardment on atmospheric nitrogen. Since the bombardment is slightly variable, and for other reasons, the 14 C taken into organic matter is also slightly variable.
That leads to errors in the chronology. - USA "Cranford"
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WikiJournal of Science is an open-access, free-to-publish, Wikipedia-integrated academic journal as a service to science, mathematics, engineering and technology topics. Mike Christie [i] Unusual, et al. This article has been through public peer rehash.
Christie, M; et al. WikiJournal of Science 1 1: That work is adapted from the Wikipedia article Radiocarbon dating. Text has also subsequently been occupied to update that same Wikipedia article Page views. Short phrases such as " Would it be possible for the authors to include a section on compliance with ethical standards to the end of this manuscript. A suitable section for that paper would be if there are indeed no conflicts of interest and no studies with human or animal subjects:.
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- - USA "CRANFORD"