Radiometric dating is a scientific method used to estimate the age of rocks and fossils. It works by measuring the amount of certain radioactive substances, called isotopes, that remain in a material compared to the amount that has decayed over time. Isotopes decay at a fixed, known rate, which acts like a natural clock. By using this rate, scientists can calculate how long it has been since the rock or fossil was formed. Radiometric dating helps us understand the history of the Earth and how life has changed over time.
Examiner-written GCSE Biology revision resources that improve your grades 2x
- Written by expert teachers and examiners
- Aligned to exam specifications
- Everything you need to know, and nothing you don’t
Share this article
written revision resources that improve your