Relative dating biology
Two broad categories of classification methods are relative dating and absolute dating.Though using similar methods, these two techniques differ in certain ways that will be discussed in this article.It is left for absolute dating to come up with the precise age of an artifact.This type of dating employs many dating techniques like atomic clocks, carbon dating, annual cycle methods, and trapped electron method.This is possible because properties of rock formations are closely associated with the age of the artifacts found trapped within them.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.For example, carbon dating is used to determine the age of organic materials.Once something dies, it ceases taking in new carbon-14, and the existing carbon-14 within the organism decays into nitrogen at a fixed rate.
It is clear then that absolute dating is based upon physical and chemical properties of artifacts that provide a clue regarding the true age.
Relative dating makes use of the common sense principle that in a deposition of layers.
A layer that is higher is of later age than a layer that is lower in order.
As the name implies, relative dating can tell which of the two artifacts is older.
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.