Carbon dating information


The universe is full of naturally occurring radioactive elements.Radioactive atoms are inherently unstable; over time, radioactive "parent atoms" decay into stable "daughter atoms." When molten rock cools, forming what are called igneous rocks, radioactive atoms are trapped inside. By measuring the quantity of unstable atoms left in a rock and comparing it to the quantity of stable daughter atoms in the rock, scientists can estimate the amount of time that has passed since that rock formed.Fossils are generally found in sedimentary rock — not igneous rock.Sedimentary rocks can be dated using radioactive carbon, but because carbon decays relatively quickly, this only works for rocks younger than about 50 thousand years.



­ ­You probably have seen or read news stories about fascinating ancient artifacts.At an ar­chaeological dig, a piece of wooden tool is unearthed and the archaeologist finds it to be 5,000 years old.A child mummy is found high in the Andes and the archaeologist says the child lived more than 2,000 years ago.How do scientists know how old an object or human remains are?

What methods do they use and how do these methods work?

In this article, we will examine the methods by which scientists use radioactivity to determine the age of objects, most notably carbon-14 dating.



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  • Carbon Dating - The New York Times profil de paulette60

    paulette60

    News about carbon dating. Commentary and archival information about carbon dating from The New York Times.…
  • Why Is Radiocarbon Dating Important To Archaeology? profil de paulette60

    paulette60

    There are two techniques for dating in archaeological sites relative and absolute dating. His radiocarbon dating technique is the most important development in absolute dating in archaeology and remains the main tool for dating the past 50,000 years. Check Out These Radiocarbon Websites For More Information
  • Carbon-14 Dating - NDT Resource Center profil de paulette60

    paulette60

    Oct 28, 2010. Each sample type has specific problems associated with its use for dating purposes, including contamination and special environmental effects. More information on the sources of error in carbon dating are presented at the bottom of this page. The method was developed immediately following World War II.…
  • How Does Radiocarbon Dating Work? - Instant Egghead #28. profil de paulette60

    paulette60

    Dec 4, 2012. How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer.…