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Everywhere you go on this planet—on land, underground, in the air, and in the water—you’ll find life that has been shaped by evolution.
In NOVA’s Evolution Lab, students will explore the evidence of evolution through the lens of phylogeny.
They then gather the radioactive, or M side up M&Ms, put them back in the container, and then pour them out again. and continue this process until all M&Ms are stable, or M side down.
Students will record the number of M&Ms that are still "radioactive" (M side up) in their data table after each run, and set aside the "stable" (M side down) M&Ms.
This activity would also be easy to adapt when talking about half-lives within a chemistry course. Also, review what a half-life is (info given the day prior during lecture/ notes/ reading).
New information needed to be introduced with parent and daughter isotopes.
They not only enjoyed this activity, but they really gained a better understanding of it as well.
So we can determine the age by determining the slope through a set of cogenetic samples. Its more convenient to work with ratios than absolute numbers, so we divide by the amount. Those that are and are the most useful for geologic dating are: Success in dating depends on choosing the right tool.