What is absolute dating
The most popular method of radio dating is radio carbon dating which is possible because of the presence of C-14, an unstable isotope of carbon.C-14 has a half life of 5730 years which means that only half of the original amount is left in the fossil after 5730 years while half of the remaining amount is left after another 5730 years.It is possible to tell the number of years ago a particular rock or archeological site had been formed.Two broad categories of classification methods are relative dating and absolute dating.
It is left for absolute dating to come up with the precise age of an artifact.
This is a method that does not find the age in years but is an effective technique to compare the ages of two or more artifacts, rocks or even sites.
It implies that relative dating cannot say conclusively about the true age of an artifact.
Carbon-14 moves up the food chain as animals eat plants and as predators eat other animals. Then this unstable isotope starts to decay into nitrogen-14.
It takes 5,730 years for half the carbon-14 to change to nitrogen; this is the half-life of carbon-14.