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Potassium-40 Is Useful For Dating Very Old Fossils

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Wednesday, September 12, 2018 12:52:09 AM
Video: H264, 2298 KB/s
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Size: 42.7 MB
Duration: 17:16
Quality 720p
Ok.definitely the type of guy i hate: aggressive flirting, over masculine and cheating. 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. Clothed male, naked female 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. As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils. A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved. However, by itself a fossil has little meaning unless it is placed within some context. The age of the fossil must be determined so it can be compared to other fossil species from the same time period.Strontium decays much too fast to be useful for dating fossils. But the half-life of potassium is billion years, and that we can use. Plus lots of other isotopes with a great range of half-lives. We can measure how much potassium- 40, say, there is in a piece of rock. But that is not enough to date the rock, because we. Correlation Dating of Potassium 40 1. So, after 56 years, there will still be a quarter of the original strontium left: PotassiumArgon dating is the.
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