How do scientists use radiometric dating to determine the age of a rock

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Radioactive dating uses the decay rates of radioactive substances to measure absolute ages of rocks, minerals and carbon-based substances, according to How Stuff Works. Scientists know how quickly radioactive isotopes decay into other elements over thousands, millions and even billions of years. Scientists calculate ages by measuring how much of the isotope remains in the substance. The key to an age of a substance is the decay-product ratio. The ratio of the original isotope and its decay product determines how many half-lives have occurred since the sample formed.
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How Do Scientists Determine the Age of Dinosaur Bones?

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Dating Sedimentary Rock - How Do Scientists Determine the Age of Dinosaur Bones? | HowStuffWorks

How do scientists find the age of planets date samples or planetary time relative age and absolute age? If carbon is so short-lived in comparison to potassium or uranium, why is it that in terms of the media, we mostly about carbon and rarely the others? Are carbon isotopes used for age measurement of meteorite samples? We hear a lot of time estimates, X hundred millions, X million years, etc.
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How do geologists use carbon dating to find the age of rocks?

September 30, by Beth Geiger. Dinosaurs disappeared about 65 million years ago. That corn cob found in an ancient Native American fire pit is 1, years old.
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To find the absolute age of a given rock, you look at radioactive decay. This involves a radioactive isotope. If the isotope is radioactive, it will evolve into a decay product. This evolution, or, rather, decay, is predicatable and can be used to determine how old the given rock is.
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