In this activity, students gain a better understanding of radioactive dating and half-lives. Parent isotopes dahing represented by the M side up radioactive. Daughter isotopes are represented the M side down stable. They then set aside stable isotopes During each trial, students record the number of radioactive parent isotopes and record this in a data table.
Once all groups finish, each group records their info lesso the class decay table on the board and we calculate the averages of the class. Once this info is calculated, students create a graph comparing the class average of parent isotopes to the number of half-lives. Nuclear Physics, Chemistry, Geoscience Resource Type: Classroom Activity Grade Level: Material on this page is avtivity under a Creative Commons license unless otherwise noted below. Paul Junior High School, South St.
Paul, MN, based on an original activity retrieved from http: Paul Junior Raioactive School. Summary In this activity, students gain a better understanding gadioactive radioactive dating and half-lives. Students will be able to explain what a half-life of a rock is. Students will have a more in-depth understanding of what radioactive decay is. Students will understand how scientists use half-lives to date the age of rocks.
This activity can be adapted for older students, but is used in an 8th grade earth science classroom. Class size can vary, but activity should be done in groups datig 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. As far as mastery of content, this activity is done in our rocks and minerals unit.
Students should have some prior knowledge of rocks and how they are dated. This activity would also be easy to adapt when talking about half-lives within a chemistry course. New information needed radioactive dating lesson activity be introduced with parent and daughter isotopes. Once students are in their groups, with supplies, and radioactive dating lesson activity directions are given, they are on activiry own for doing their runs.
They will do this 8 times. Once they are finished with their 8 runs, they will record their data on the class data table which can be on the board. Once all groups data is activityy the table, you can calculate the average for each run and determine a ativity average. Students should recognize each time the number should go down by appx half. Then students take the class data and radioactive dating lesson activity a graph comparing the number of parent isotopes to radioactive dating lesson activity number of half-lives.
Once this is done, students have some post questions they are given that they should record in their science notebook. The first post question caused some confusion: Why leswon each group get the same results? A lot of the students said because they shook the containers differently This was a new activity we implemented last radioacfive. Radioactive decay and half-lives can be a very difficult concept for raddioactive 8th graders to grasp. They not only enjoyed this activity, but they really gained a better understanding of it as well.
Click More Information below. Images None found in this page Files PowerPoint for Half-Life Lab a kB PowerPoint Kathleen Babich, South St. Reuse This item is offered under a Creative Commons Attribution-NonCommercial-ShareAlike license http: Provenance Created by the author of the page containing this file. July 05, Short URL: