# Carbon dating exercises

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Carbon dioxide is distributed on a worldwide basis into various atmospheric, biospheric, and hydrospheric reservoirs on a time scale much shorter than its half-life.

Half of these carbon-14 atoms will decay during the next 5730 years; therefore after three half-lives, one-eighth of the original carbon-14 atoms still remains.

Radiation counters are used to detect the electrons given off by decaying C-14 as it turns into nitrogen.

The amount of C-14 is compared to the amount of C-12, the stable form of carbon, to determine how much radiocarbon has decayed, thereby dating the artifact.

Carbon-14 is a parent material, which decays to its daughter material, nitrogen-14.

The half-life of an isotope is the time it takes for half of the atoms in the isotope to decay.

Follow the steps listed below to illustrate the radioactive decay of carbon-14; then answer the questions: Each cut represents the half-life of carbon-14. Multiply the number of cuts by the half-life of carbon-14.

What is the total amount of time represented by the cuts?After the organism dies, carbon-14 continues to decay without being replaced.To measure the amount of radiocarbon left in a artifact, scientists burn a small piece to convert it into carbon dioxide gas.Use the following table of some other isotopes and their half-lives to answer the questions listed below: INSERT TABLE HERE If you had a 100-gram sample of plutonium, how much would remain after 43 years?Answer: 75 grams If you had a 5-gram sample of Lawrencium, how much would still remain after 30 minutes?The method was developed immediately following World War II by Willard F.

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But after a drought in 1986, two brothers who were fishermen noticed the outline of an object poking up through the mud on the shore of the Sea of Galilee.