Part 1 (in the previous issue) explained how scientists observe unstable atoms changing into stable atoms in the present.
For example, uranium will radioactively decay through a series of steps until it becomes the stable element lead. The original element is referred to as the parent element (in these cases uranium and potassium), and the end result is called the daughter element (lead and argon).An hourglass is a helpful analogy to explain how geologists calculate the ages of rocks.When we look at sand in an hourglass, we can estimate how much time has passed based on the amount of sand that has fallen to the bottom.The atoms of each element may vary slightly in the numbers of neutrons within their nuclei.I read through your article concerning the existence and life of dinosaurs. Different radioactive isotopes can be used to date material from bone fragments to rocks so in fact, yes there is a great amount of proof that the Earth is billions of years old and that dinosaurs lived millions of year ago. M., Thanks for stopping by at our website to read our article concerning the existence and life of dinosaurs.