If I told you that I was 30 years old, that number would be my numerical age.
In 1896, a French physicist named Henri Becquerel discovered radioactivity in an element called uranium.
He saw that it underwent radioactive decay, or emission of energetic particles to produce new elements.
Scientists know that the layers they see in sedimentary rock were built up in a certain order, from bottom to top.
When they find a section of rock that has a lot of different strata, they can assume that the bottom-most layer is the oldest and the top-most layer is the youngest.
Free 5-day trial Learn how scientists determine the ages of rocks and fossils.
We'll explore both relative and numerical dating on our quest to understand the process of geological dating.Scientists are always spouting information about the ages of rocks and fossils. Well, they figure it out using two different methods: relative dating and numerical dating.Let's find out more about these geological dating methods in order to understand how Paul the Paleontologist can be so sure about the age of his dinosaur fossils.That means they don't really know how old their rocks actually are.The key in relative dating is to find an ordered sequence.He could be pretty confident that his super awesome dinosaur was about 175 million years old.