Answers to radiometric dating assignment
In this case, U238 is the “parent” and Pb206 is the “daughter.” Scientists begin by measuring how long it takes for a parent isotope to decay into a daughter isotope.
In this particular case, it takes 4,460,000,000 years for half of a sample of U238 to decay into Pb206.
If any of these assumptions are wrong, the method cannot accurately determine the age of a specimen.These are the methods that are commonly used on inorganic samples such as rocks, and that often give extremely long ages-millions or billions of years.Evolutionists often describe these methods as proving the ancient age of the earth and its strata.It takes another 4,460,000,000 years for half of the remaining sample to decay into Pb206 and then another 4,460,000,000 years for half of what’s then left to decay, and so on.The time it takes for half of a sample to decay is called a “half-life.” By measuring radioactive half-lives, by measuring how much parent and daughter are present in any given specimen, and by making certain key assumptions, scientists believe they are able to accurately determine the age of a specimen. The question is what are the underlying key assumptions and how reliable are they?