So, every living thing is constantly exchanging carbon-14 with its environment as long as it lives. The carbon in its body will remain until it decomposes or fossilizes.The amount of carbon-14 gradually decreases through radioactive beta decay with a half-life of 5,730 years.When creation scientists studied granite samples, they made interesting discoveries. One of the most frequent uses of radiocarbon dating is to estimate the age of organic remains from archaeological sites.William Smith was one of the most important scientists from this time who helped to develop knowledge of the succession of different fossils by studying their distribution through the sequence of sedimentary rocks in southern England.It wasn't until well into the 20th century that enough information had accumulated about the rate of radioactive decay that the age of rocks and fossils in number of years could be determined through radiometric age dating.Some very straightforward principles are used to determine the age of fossils.
At high geomagnetic latitudes, the carbon-14 spreads evenly throughout the atmosphere and reacts with oxygen to form carbon dioxide.It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities. Students not only want to know how old a fossil is, but they want to know how that age was determined.This activity on determining age of rocks and fossils is intended for 8th or 9th grade students.It is estimated to require four hours of class time, including approximately one hour total of occasional instruction and explanation from the teacher and two hours of group (team) and individual activities by the students, plus one hour of discussion among students within the working groups.