Radioactive decay and half-lives can be a very difficult concept for our 8th graders to grasp. January 05, Short URL: Kathleen Babich, South St.
Paul, MN, based on an original activity retrieved from http: Students should recognize each time the number should go down by appx half. Students will understand how scientists use half-lives to date the age of rocks. Paul Junior High School. Students should have the skill to set up a data table and a graph, however, if you want to use this activity with students that have not, you can provide them a template with that information. Click More Information below. Why didn't each group get the same results?