Radio carbon dating calculations

Plants and animals assimilate carbon 14 from carbon dioxide throughout their lifetimes.When they die, they stop exchanging carbon with the biosphere and their carbon 14 content then starts to decrease at a rate determined by the law of radioactive decay.The ratio of carbon-12 to carbon-14 at the moment of death is the same as every other living thing, but the carbon-14 decays and is not replaced.

No other scientific method has managed to revolutionize man’s understanding not only of his present but also of events that already happened thousands of years ago.For radiocarbon dating to be possible, the material must once have been part of a living organism.This means that things like stone, metal and pottery cannot usually be directly dated by this means unless there is some organic material embedded or left as a residue.The use of various radioisotopes allows the dating of biological and geological samples with a high degree of accuracy.However, radioisotope dating may not work so well in the future.