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It's an estimate, not a calculation. The range of validity of carbon dating is an important thing about it, and particularly interesting for kids.
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An [[atom]] whose nucleus is not stable.<ref>Wile, Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>
 
An [[atom]] whose nucleus is not stable.<ref>Wile, Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>
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Radioactive isotopes have many applications in [[science]] and [[medicine]].  One application is [[radiocarbon dating|carbon 14 dating]].<ref>http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/cardat.html</ref>  This allows [[scientist]]s to calculate the age of the remains of once-living things.
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Radioactive isotopes have many applications in [[science]] and [[medicine]].  One application is [[radiocarbon dating|carbon 14 dating]].<ref>http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/cardat.html</ref>  This allows [[scientist]]s to estimate the age of the remains of once-living things up to tens of thousands of years old.
    
==References==
 
==References==
 
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[[category:physics]]
 
[[category:physics]]
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