Evolution radioactive dating

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Slideshows Videos Audio. Here of some of the well-tested methods of dating used in the study of early humans: Potassium-argon datingArgon-argon datingCarbon or Radiocarbonand Uranium series. All of these methods measure the amount of radioactive decay of chemical elements; the decay occurs in a consistent manner, like a clock, over long periods of time.

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Nineteenth century geologists recognized that rocks formed slowly as mountains eroded and sediments settled on the ocean floor.

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This page has been archived and is no longer updated. Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4. Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free. These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing.

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