Simple definition relative dating

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Scientists measure the proportion of carbon-14 left in the organism to determine its age.

Dating is a technique used in archeology to ascertain the age of artifacts, fossils and other items considered to be valuable by archeologists.

There are many methods employed by these scientists, interested in the old, to get to know the age of items.

It is possible to tell the number of years ago a particular rock or archeological site had been formed.

As an example of how they are used, radiometric dates from geologically simple, fossiliferous Cretaceous rocks in western North America are compared to the geological time scale.

It is not about the theory behind radiometric dating methods, it is about their , and it therefore assumes the reader has some familiarity with the technique already (refer to "Other Sources" for more information).

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.

Relative dating and radiometric dating are used to determine age of fossils and geologic features, but with different methods.

Relative dating uses observation of location within rock layers, while radiometric dating uses data from the decay of radioactive substances within an object.

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