Non radiometric dating methods

12 Dec

Did you know that you can be a Christian, and believe that the earth is billions of years old?You can even believe in evolution and be a Christian.Some isotopes have short half-lives of minutes or years, but Potassium-40 has a half-life of 1.3 billion years.Radiometric dating requires that one understand the initial ratio of the two elements in a given sample by some means.Astronomers use the distance to galaxies and the speed of light to calculate that the light has been traveling for billions of years.

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Many independent measurements have established that the Earth and the universe are billions of years old.An element in the periodic table can come in different flavors called isotopes.Some isotopes are unstable, and over time these isotopes “decay” into isotopes of other elements.For example, the last 200 rings in the dead tree might match up with 200 rings early in the life of the living tree, so the two trees together can count back many years.In this way, multiple trees can be used to build a master chronology for a forested region.