What Is Carbon Dating Gcse
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More radioactive dating - higher tier only
All living things take in carbon from the environment. The half-life of carbon is 5, years. Animals take in carbon when they eat food because food contains carbon. All living things therefore have carbon in them at the same amount carboj is present in the environment. Only one in billion carbon atoms bcse the isotope carbon The others are not radioactive. This amount is small. The isotope carbon is created at a constant rate in the upper atmosphere by cosmic rays acting on nitrogen. How is Carbon formed. The further back in time that something died, the less carbon will be present datingg it today. There is therefore a fixed amount of carbon in the environment which is a balance between the rate at which it is formed in the atmosphere and what is carbon dating gcse rate at which it decays back to nitrogen.