Fossils dating rock

As radioactive isotopes of elements decay, they lose their radioactivity and become a brand new element known as a daughter isotope.

Different isotopes have different half-lives and sometimes more than one present isotope can be used to get an even more specific age of a fossil.Now it is time to put those math skills to good use.At one half-life, you would have approximately 50% Carbon-14 and 50% Nitrogen-14.One way that helps scientists place fossils into the correct era on the Geologic Time Scale is by using radiometric dating.Also called absolute dating, scientists use the decay of radioactive elements within the fossils or the rocks around the fossils to determine the age of the organism that was preserved.

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