Does radioactivity involve playing with your radio? Not exactly! In this BrainPOP UK movie, Tim and Moby discuss what the term ‘radioactive’ means. Learn why some atoms are unstable; how they can change into completely different atoms with different properties; how some radioactive elements can change or decay; and how many billions of years it could take for that change to occur. In this educational, animated movie you’ll also see how radioactive decay can create dangerous rays or particles, and you’ll learn how radioactivity can be, not only harmful, but also helpful to humans! It’s a fine line – let’s tread it with care!