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21 Mar

Familiar to us as the black substance in charred wood, as diamonds, and the graphite in “lead” pencils, carbon comes in several forms, or isotopes.

One rare form has atoms that are 14 times as heavy as hydrogen atoms: carbon-14, or C ratio gets smaller.

The radioactive carbon-14 combines with oxygen to form carbon dioxide and is incorporated into the cycle of living things.

Carbon-14 is a radioactive with a half life of about 5700 years. On average it is 250 US dollars CONTENTS INTRODUCTION HOW CARBON-14 IS MADE DATING A FOSSIL OCURRENCE OF CARBON -14 APPLICATIONS THE OTHER THING BY WHICH DATING IS DONE USING RADIO CARBON UNCERTAINTY IN CARBON DATING COST TO DATE RADIO CARBON CONCLUSION INTRODUCTION Carbon dating is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (14C) to determine the age of carbonaceous materials up to about 60000 years.

We will deal with carbon dating first and then with the other dating methods.

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Some examples of the types of material that radiocarbon can determine the ages of are wood, charcoal, marine and freshwater shell, bone and antler, and peat and organic-bearing sediments.

We stick the garden hose in and turn it on full blast.

The water coming out of the hose is analogous to the continuous production of carbon-14 atoms in the upper atmosphere.

The barrel represents the earth's atmosphere in which the carbon-14 accumulates.

The water leaking out the sides of the barrel represents the loss (mainly by radioactive decay) of the atmosphere's supply of carbon-14.