Radioactive dating for middle school
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Skills: -critical thinking -data analysis -questioning -graphing and data collecting Vocab Words: 1. 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 of 2-3.
Learn about different types of radiometric dating, such as carbon dating.This method is useful for archaeologists working in areas where volcanic eruptions have left layers of ash above and below an archaeological deposit.The volcanic layers can be dated, and the archaeological material will date to the period between those two volcanic eruptions.Once all groups finish, each group records their info on the class decay table (on the board) and we calculate the averages of the class. Isotope Concepts: Students should begin to see the pattern that each time they dump out their M&Ms, about half become stable.Once this info is calculated, students create a graph comparing the class average of parent isotopes to the number of 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. Students then should be able to see the connection of the M&Ms and radioactive elements in rocks, and how scientists can determine the age of rocks by looking at the amount of radioactive material in the rock.