Radiometric dating, utilizing the predictable decay rates of radioactive isotopes within rocks and other materials, is the primary method for determining the age of geological samples. Multiple ...

In this lesson, students will simulate the randomness of decay in radioactive atoms and visualize the half-life of a sample radioactive element. This lesson can be completed in two (2) 45-minute class ...

In what scientists sometimes call “the restless universe” are a few unchallenged constants that have become the bench marks of basic research. Among them are absolute zero, which represents cold so ...