Lesson Components
1. Check out Acahualinca, Kennewick Man, and Roopkund. Make notes in your comp book. How was C-dating used?
2. Determine C14/C12 ratio in our sample of frozen mammouth. I'm going to remove jellybeans when you're not looking and replace them with seeds. Each day represents 125 years of passing time. What is the half-life of the C14 jellybean? Make a plot of (C12/C14) vs. time. We'll discuss.
3. Watch: http://www.youtube.com/watch?v=31-P9pcPStg
4. Read How Carbon-14 Dating Works at HowStuffWorks (see handout).
We'll also talk about the Carbon-14 Debunkers/Creationists, politics of science (briefly!), and the Earth really is older than 5,000 years.
What are some of the challenges of carbon dating?
Draw solar system diagrams for C14 and C12. How do they vary?
Know these definitions and write them in your comp book:
isotope
radiometric dating
radioactive decay
carbon exchange reservoir
half-life
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