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When an organism dies, it contains the standard ratio of 14C to 12C, but as the 14C decays with no possibility of replenishment, the proportion of carbon 14 decreases at a known constant rate.The time taken for it to reduce by half is known as the half-life of 14C.The graph expresses the annual evolution of the frequency of use of the word «carbon dating» during the past 500 years.Its implementation is based on analysing how often the term «carbon dating» appears in digitalised printed sources in English between the year 1500 and the present day.

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After cessation of life, it decays with a half-life 5-57 x 103 years . The Science Dictionary is the most comprehensive source of science definitions online with over 38K science terms written and created by our global team of scientists and academic professionals.

Since the introduction of carbon dating, the method has been used to date many items, including samples of the Dead Sea Scrolls, the Shroud of Turin, enough Egyptian artefacts to supply a chronology of Dynastic Egypt, and Ötzi the Iceman.

The Earth's atmosphere contains various isotopes of carbon, roughly in constant proportions.

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The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers.