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Posted by / 11-Oct-2019 10:23

Carbon dating explained

Voila, now you can tell how old a sample of organic matter is.

Some notes: 1) Obviously, this technique only works for dead organic material.

However it is possible, when dating very old rocks for instance, to use longer lived isotopes for dating on a longer time scale.

3) The assumption we based this on (that the ratio of carbon 14 in the atmosphere and thus in living organisms is constant) is a decent one for ballpark figures, but this method will not be able to give results accurate to, say, a couple of minutes.

For example, say a fossil is found that has 35% carbon 14 compared to the living sample. We can use a formula for carbon 14 dating to find the answer.On the other hand, if tons of half-lives have passed, there is almost none of the sample carbon 14 left, and it is really hard to measure accurately how much is left.Since physics can't predict exactly when a given atom will decay, we rely on statistical methods in dealing with radioactivity, and while this is an excellent method for a bazillion atoms, it fails when we don't have good sample sizes.2) This technique is best for dating items which died between on the order of 1000 to on the order of 1,000,000 years ago.Carbon 14 dating is not great for dating things like a year old because if much less than 1 half-life has passed, barely any of the carbon 14 has decayed, and it is difficult to measure the difference in rates and know with certainty the time involved.

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Carbon Dating is a method of dating samples with the element Carbon in them.

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