That’s because zircon is super tough – it resists weathering. Each radioactive isotope works best for particular applications.
The half-life of carbon 14, for example, is 5,730 years.
Here is an easy-to understand analogy for your students: relative age dating is like saying that your grandfather is older than you.
Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.
They can be administered selectively to malignant tumours and so minimize damage to adjacent healthy tissue.
nuclear fission; nuclear reactor: Nuclear fission reactors).
Relative age dating also means paying attention to crosscutting relationships.