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On the other hand, the abundance of argon in the Earth is relatively small because of its escape to the atmosphere during processes associated with volcanism.

The potassium-argon dating method has been used to measure a wide variety of ages.

Adapted from: For Special Ed and ELL kids, you could give them a template of the data table/graph.

The first post question caused some confusion: Why didn't each group get the same results?

Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work! This dating method is based upon the decay of radioactive potassium-40 to radioactive argon-40 in minerals and rocks; potassium-40 also decays to calcium-40. Paul, MN, based on an original activity retrieved from also with the help of Jenni Johansen (other 8th grade science teacher at So. Paul Junior High School In this activity, students gain a better understanding of radioactive dating and half-lives.Daughter isotopes are represented by the M side down (stable).Although students could work through the simulation individually, I prefer partnerwork to foster discussion among students, encouraging scientific discourse (SP7).In this video I walk you through using the simulation.

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