So how do we know the dates that scientists give for fossils and rocks are correct? We have a good grasp of how half-life works. But we are dealing in tens of thousands, millions, even billions of years. How do they figure those dates out? Well, believe it or not it's MATH. Oh no, MATH.
I am going to attempt to share with you the math of radiometric dating. There will be logorithms and decay rates and ratios Oh my. But I promise you will come out of this being able to find the age of a rock or fossil just like a scientist does when he gets the parent/daughter ratio from the laboratory.
You can come just to watch. But if you are really interested please bring a scientific calculator. I use a TI-83plus. Practice getting Logorithms(LOG) and Natural logarithms(LN) from your calculator before the meet up and things will go much smoother when you get here.