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Posted by / 25-Jun-2015 16:04

Dating made simple

Radioactive and non-radioactive carbon dioxide mix throughout the atmosphere, and dissolve into the oceans.

Through photosynthesis carbon dioxide enters plants and algae, bringing radiocarbon into the food chain.

Although many people think radiocarbon dating is used to date rocks, it is limited to dating things that contain the element carbon and were once alive (like fossils).

Rb)—are not being formed on earth, as far as we know.

To measure the rate of decay, a suitable detector records the number of beta particles ejected from a measured quantity of carbon over a period of time, say a month (for illustration purposes).The radiocarbon half-life or decay rate has been determined at 5,730 years.Next comes the question of how scientists use this knowledge to date things.If carbon-14 has formed at a constant rate for a very long time and continually mixed into the biosphere, then the level of carbon-14 in the atmosphere should remain constant.If the level is constant, living plants and animals should also maintain a constant carbon-14 level in them.

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Carbon-14 dating is a way of determining the age of certain archeological artifacts of a biological origin up to about 50,000 years old.

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