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This experiment is best used by student working in pairs.

Grade Level: 5-12 grade Disciplinary Core Ideas (DCI) 3-5ETS1-2, MS-ESS1-4, HS-ESS1-6 Time for Teacher Preparation 40-60 minutes – To gather materials Activity Time: 40-60 minutes (1 Class Period) Materials: Objectives Students try to model radioactive decay by using the scientific thought process of creating a hypothesis, then testing it through inference.

Students should begin to see the pattern that each time they “take a half-life,” about half of the surrogate radioactive material becomes stable.

Students then should be able to see the connection between the M&M’s and Puzzle Pieces and radioactive elements in archaeological samples.

Find instructions for chemistry experiments and learn about chemical reactions, elements, and the periodic table in this collection.

Teachers can also find chemistry resources for the classroom.

Check out these links for ideas to celebrate it chemistry-style.

You can easily adapt the video lessons, transcripts, and quizzes to take full advantage of the comprehensive and engaging material we offer.

Description: With the Half-Life Laboratory, students gain a better understanding of radioactive dating and half-lives.

Students are able to visualize and model what is meant by the half-life of a reaction.

The mathematics of inferring backwards from measurements to age is not appropriate for most students.

They need only know that such calculations are possible. 79.) In this lesson, students will be asked to simulate radioactive decay by pouring small candies, such as plain M&M's® or Skittles®, from a cup and counting which candies fall with their manufacturer's mark down or up.

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We discuss in some detail the chemical pretreatment of the samples and the data evaluation.

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