updating store technology retail - Simple definition radiometric dating


One way that helps scientists place fossils into the correct era on the Geologic Time Scale is by using radiometric dating.

simple definition radiometric dating-41

The half-lives of several radioactive isotopes are known and are used often to figure out the age of newly found fossils.

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.

It then takes the same amount of time for half the remaining radioactive atoms to decay, and the same amount of time for half of those remaining radioactive atoms to decay, and so on. The amount of time it takes for one-half of a sample to decay is called the half-life of the isotope, and it’s given the symbol: It’s important to realize that the half-life decay of radioactive isotopes is not linear.

For example, you can’t find the remaining amount of an isotope as 7.5 half-lives by finding the midpoint between 7 and 8 half-lives.

Follow the links below to learn more about radiocarbon dating. Radiocarbon dating uses carbon isotopes A special kind of radiocarbon dating: Bomb radiocarbon dating What is an isotope?