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­ ­As soon as a living organism dies, it stops taking in new carbon.The ratio of carbon-12 to carbon-14 at the moment of death is the same as every other living thing, but the carbon-14 decays and is not replaced.Until this century, relative dating was the only technique for identifying the age of a truly ancient object.By examining the object's relation to layers of deposits in the area, and by comparing the object to others found at the site, archaeologists can estimate when the object arrived at the site.Carbon-14, or radiocarbon, is a naturally occurring radioactive isotope that forms when cosmic rays in the upper atmosphere strike nitrogen molecules, which then oxidize to become carbon dioxide.Green plants absorb the carbon dioxide, so the population of carbon-14 molecules is continually replenished until the plant dies.However, the principle of carbon-14 dating applies to other isotopes as well.Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years.

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Radiocarbon dating involves determining the age of an ancient fossil or specimen by measuring its carbon-14 content.Carbon-14 is also passed onto the animals that eat those plants.After death the amount of carbon-14 in the organic specimen decreases very regularly as the molecules decay.Love-hungry teenagers and archaeologists agree: dating is hard.

But while the difficulties of single life may be intractable, the challenge of determining the age of prehistoric artifacts and fossils is greatly aided by measuring certain radioactive isotopes.

Explain how carbon can help determine the age of some objects .



Carbon dating objects comments


  • Dating a Fossil - Carbon Dating HowStuffWorks profil de paulette60

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    Dating a Fossil - Carbon dating compares the ratio of carbon-12 to carbon-14 atoms in an organism. it is only reliable for dating objects up to about 60,000 years.…
  • Does carbon dating prove the earth is millions of years old. profil de paulette60

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    How Carbon Dating Works Radiation from the sun. Does carbon dating prove the earth. This is why most people say carbon dating is only good for objects less than.…
  • Radiocarbon dating - Wikipedia profil de paulette60

    paulette60

    Radiocarbon dating also referred to as carbon dating or carbon-14 dating is a method for determining the age of an object containing organic material by using the.…
  • How Do Scientists Date Ancient Things? - Live Science profil de paulette60

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    Love-hungry teenagers and archaeologists agree dating is hard. But while the difficulties of single life may be intractable. Carbon-14, or radiocarbon.…