PBS
Pbs Learning Media: Radiometric Dating
In this video segment from A Science Odyssey, scientists explain how Earth's age was determined by examining the radioactive rocks in Earth's crust.
Other
Radioactive Dating
Have you ever wondered how paleontologists and geologists determine the age of fossils or geologic events that occurred in the past? Explore the processes of radioactive decay and radioactive dating. The chemistry of half-lives of...
Khan Academy
Khan Academy: Measuring Age on Earth: K Ar Dating Calculation
Work through a calculation for K-Ar dating this video lecture. Understand the mathematics in estimating age using radioactive dating. [11:06]