Their method, a type of radiometric dating called uranium-lead (U-Pb) dating, relies on the fact that uranium isotopes radioactively decay to form lead isotopes.
By comparing the amount of each isotope in a sample, the age of the sample can be calculated.
Find additional lessons, activities, videos, and articles that focus on relative and absolute dating.
"How can creationists expect people to accept a young earth when science has proved through radiometric dating that the earth is billions of years old?
" This article addresses that question, which represents the thinking of a large number of people today.
It furnishes some good evidences that creationists often use.
But we won't discuss the C-14 method in this article.
By dating these surrounding layers, they can figure out the youngest and oldest that the fossil might be; this is known as "bracketing" the age of the sedimentary layer in which the fossils occur.
Teach your students about absolute dating: Determining age of rocks and fossils, a classroom activity for grades 9-12.
The universe is full of naturally occurring radioactive elements.
Radioactive atoms are inherently unstable; over time, radioactive "parent atoms" decay into stable "daughter atoms." When molten rock cools, forming what are called igneous rocks, radioactive atoms are trapped inside. By measuring the quantity of unstable atoms left in a rock and comparing it to the quantity of stable daughter atoms in the rock, scientists can estimate the amount of time that has passed since that rock formed.
And yet this theory is nearly universally accepted and taught, and those who reject it are considered as fanatical and risk professional ostracism!
This has to be one of the most unusual chapters in the history of science.
But, to my knowledge, there has not been a single double-blind test of radiometric dating methods.