Absolute age dating: Have students work alone or in pairs to find an article or paper that uses radiometric age dating.
Carbon dating is used to determine the age of biological artifacts up to 50,000 years old.
There are two basic approaches: relative age dating, and absolute age dating.
On the other hand, the half-life of the isotope potassium 40 as it decays to argon is 1.26 billion years.You might have noticed that many of the oldest age dates come from a mineral called zircon.That’s because zircon is super tough – it resists weathering. Each radioactive isotope works best for particular applications.Watch the video to see how and download the student handout (word document).Unlike people, you can’t really guess the age of a rock from looking at it.