Radiometric dating is a process of identifying the age of a material based on known half-lives of decaying radioactive materials found in both organic and inorganic objects.
That isotope is then compared to its decaying product and scientists are able to use known decay rates to determine how old the initial isotope is.
Students not only want know how old fossil is earth?
One example of this can be found in metamorphic rocks.
A relatively short-range dating technique is based on the decay of uranium into thorium, a substance with a half-life of about 80, years.
These rates are usually expressed as the isotope's half-life--that is, the time it takes for one-half of the parent isotopes to decay.
Scientists determined the Earth's age using a technique called radiometric dating.
Hutton's theories were short on evidence at first, but by 1830 most scientists concurred that Noah's ark was more allegory than reality as they documented geological layering.
Using fossils as guides, they began to piece together a crude history of Earth, but it was an imperfect history.
Over time, radioactive isotopes change into stable isotopes by a process known as radioactive decay.
Some radioactive parent isotopes decay almost instantaneously into their stable daughter isotopes; others take billions of years.
Radioactive decay also known as This constant probability may vary greatly between different types of nuclei, Radiometric dating.
Learn about different types of radiometric dating, such as carbon dating.
Depending on what is being dated (what it is composed of, where it resides) some methods will be more effective than others.