Fossil radioactive dating
But the basic concept of radioactive dating, sometimes called radiometric dating, is not difficult, especially since all of us regularly calculate how much time has passed: for example, since our birth, or since we started on a walk.
A swimming race is a familiar situation that illustrates the simple principles involved in measuring time.
Adrian Grahams began writing professionally in 1989 after training as a newspaper reporter.
His work has been published online and in various newspapers, including "The Cornish Times" and "The Sunday Independent." Grahams specializes in technology and communications.
Picture a swimmer competing in a 1,500 metre race and an observer with an accurate wristwatch.
You could describe the atomic workings of the quartz oscillator and how it resonates at a specific and highly stable frequency, and how this is used to accurately pace a timekeeping mechanism.