Relative dating is the same as radioactive dating
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Relative dating is the more conventional of the two.
In palaeontology and archaeology, it becomes necessary to determine the age of an artifact or fossil when it is uncovered.
This, of course, is so that it can be properly catalogued, and, if valid, can be related to or associated with other objects from the same era. Fossils and artifacts don't come with labels attached that clearly state their age.
For example, in decomposing organic bodies - such as an animal carcass - carbon-14, an isotope of carbon, is present.
Overtime, the C-14 atoms give off radiation, and, eventually, transform into nitrogen-14 atoms.
Search for relative dating is the same as radioactive dating:
The term used to define the amount of time it takes for half of the radioactive atoms, such as C-14, in a body or object to decay fully is known as a "half-life." The half-life of C-14 is approximately 5 730 years.