• The half-life of a radioactive isotope explains the amount of time that it takes half of the isotope in a sample to decay.

• Carbon-14 Dating is a way to determine the age of archeological artifacts.

• It is used in dating things such as bone, cloth, wood, and plant fibers.

• Carbon dating is a variety of radioactive dating which is only to matter that once lived.

• The radioactive carbon-14 combines with oxygen to form carbon dioxide.

• The carbon-14 forms at a rate which appears to be constant, so that by measuring the radioactive emissions.

• Carbon-14 decays with a half life of about 5730 years by the emission of an electron of energy.

• Scientists use a technique called radiometric dating to estimate the ages of rocks, fossils, and the earth.

• Many people have been led to believe that radiometric dating methods have proved the earth to be billions of years old.

• http://mathcentral.uregina.ca/beyond/articles/ExpDecay/Carbon14.html

• http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/cardat.html