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What can radiometric dating reveal

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This belief is based upon three significant assumptions.Radiometric dating is a technique used to date materials based on a knowledge of the decay rates of naturally occurring isotopes, and the current abundances.We have chosen to focus on hominid evolution because (1) it is one of the most controversial and misunderstood topics in science today; (2) the hominid fossil record has recently become particularly rich, providing a framework for constructing phylogenies of human evolution; (3) skulls are small and transportable (vs whale bones), ideal for hands-on observations and measurements (currently at least 92 measurements are used in fossil skull interpretations, see Cameron and Groves We have found that students are fascinated by the opportunity to handle life-size fossil replicas and to find out the stories that can emerge from them.Students gain an understanding of macroevolution (evolution occurring through deep time) vs microevolution, as radiometric dating of observed skulls reveals the magnitude of geologic time.

Radiometric Dating - A Brief Explanation Radiometric dating is the primary dating scheme employed by scientists to determine the age of the earth.A particular isotope of a particular element is called a nuclide. That is, at some random point in time, an atom of such a nuclide will be transformed into a different nuclide by the process known as radioactive decay.This transformation is accomplished by the emission of particles such as electrons (known as beta decay) or alpha particles.It is our principal source of information about the age of the Earth and a significant source of information about rates of evolutionary change.Various methods exist differing in accuracy, cost and applicable time scale.Radiometric dating techniques take advantage of the natural decay of radioisotopes.