Carbon Dating Method Ppt

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CARBON DATING One of the most often discussed dating methods is Carbon 14 dating . Carbon 14 dating does not and can not prove ages greater than 50,000 - 75,000 years old . However, it is often cited to as confirmation for modern archeology and paleo-anthropology to prove the existence of long ages . This presentation deals with the mechanics, assumptions, and problems associated with Carbon -14 dating .
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Carbon Dating II When Dead, no more absorption of carbon takes place the C(14) begins its decay to N(14) C(14) --> N(14)+ e hence the ratios of C(12) to C(14) change this change can be measured by the rate of nuclear activity C(14) has a half-life of only 5730 years, so only very young things can be measured (~50000 yrs .) Carbon Dating III Inaccuracies: the sun is not constant in its output many species do not attain carbon from the atmosphere, etc .
How the Carbon Dating Clock Works Once a plant or animal dies the clock starts The plant or animal no longer takes in C-14 The C-14 present in the plant or animal begins to decay No more C- C-14 continues 14 intake to decay 16 .
was grown can be determined exactly (by counting); so radiocarbon dating can be tested by measuring the 14C concentrations in old tree rings . Such testing found errors of up to several centuries . It turns out that the concentration of 14C in the carbon of the surface atmosphere has not been a constant 1 ppt , but has varied with time . Thus the
Materials that have been radiocarbon dated since the inception of the method include: •charcoal, wood, twigs, seeds, peat, pollen, resins •bones, shells, corals •hair, leather, blood residues •lake mud, soil, water •pottery, wall paintings, fabrics, paper, and parchment . All must have at least some carbon of organic origin .
the Carbon Footprint ICTs and Climate Change International Symposium BT Centre Auditorium, London 17-18th June 2008 Pankaj Bhatia . . . Microsoft PowerPoint - s3p5-bhatia . ppt Author: paladin Created Date: 6/18/2008 10:24:36 AM . . .
History of Radiocarbon-14 Dating . The method developed in the 1940's and was a ground-breaking piece of research that would change dating methods forever . A team of researchers led by Willard F . Libby calculated the rate of radioactive decay of the 14 C isotope (4) in carbon black powder .
Carbon dating is one of the archaeology's mainstream methods for dating organic objects up to 50,000 years old . This method is based on the idea of radiative decay of Carbon -14 isotopes over thousands of years . Through physics, scientists have discovered that radioactive molecules decay at a specific rate dependent on the atomic number and mass of . . .
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Radiocarbon dating is a method that provides objective age estimates for carbon -based materials that originated from living organisms . 1 An age could be estimated by measuring the amount of carbon -14 present in the sample and comparing this against an internationally used reference standard .
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Carbon Dating Method Ppt