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Dating Techniques (Archaeology)
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Summary
Dating techniques are used to date the existence of an organism on the Earth. This video throws light on several techniques that are used in modern times. Carbon dating is one such technique that utilizes the fact that carbon is an integral part of life on earth. The nucleus of a typical carbon atom has 6 protons and 6 neutrons but one carbon atom out of every 100 has one extra neutron. This carbon atom is called C13. There is another variant called C14 that is formed when cosmic rays strike atoms of nitrogen. The nucleus of C14 is unstable and after some time C14 decays back to nitrogen. Since C14 is formed at a constant rate, there is a constant level of it in the environment. Out of every trillion carbon atoms, one dozen are C14. As long as an organism is alive and eating it maintains a constant ratio of C14 to normal carbon atoms. But once the organism dies, the amount of C14 in the body begins to decrease. By measuring the ratio of C14 to normal carbon atoms, details of the existence of an organism can be estimated. Other dating methods include DNA mutation dating, Paleomagnetic dating, radiometric dating and Thermo luminescence.
Keywords: Carbon, universe, earth, dating, Carbon dating, DNA mutation dating, Paleomagnetic dating, radiometric dating and Thermo luminescence, C14, C13
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