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What I want to do in this video is kind of introduce you to the idea of, one, how carbon-14 comes about, and how it gets into all living things. They can also be alpha particles, which is the same thing as a helium nucleus. And they're going to come in, and they're going to bump into things in our atmosphere, and they're actually going to form neutrons. And we'll show a neutron with a lowercase n, and a 1 for its mass number. And what's interesting about this is this is constantly being formed in our atmosphere, not in huge quantities, but in reasonable quantities. Because as soon as you die and you get buried under the ground, there's no way for the carbon-14 to become part of your tissue anymore because you're not eating anything with new carbon-14.
The process of Relative Dating was established by Nicholaus Steno in the 1600's.
While this may sound questionable at first, keep in mind that we also accept the Law of Gravity with out direct proof.
Visit the following site and read about each of Steno's laws (principles).
The web site is simple, especially at the begnining, yet allows you to visualize relationships among the main concepts you have been studying.
The site ends with a short quiz - you should get a perfect score if you understand Web Assisgnment 4.
Answer the questions about each aspect of radiometric dating as you move through the various exercises of the Radiometric Dating Lab.