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In your planning, be sure to include time at the end of the lesson for students to post their data and share the class data.
Before the lesson, you will have to weigh out about 80 candies for each group of students.
The final lesson, Frosty the Snowman Meets His Demise: An Analogy to Carbon Dating, is based on gathering evidence in the present and extrapolating it to the past.
To do this lesson and understand half-life and rates of radioactive decay, students should understand ratios and the multiplication of fractions, and be somewhat comfortable with probability.
: any of two or more species of atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties These example sentences are selected automatically from various online news sources to reflect current usage of the word 'isotope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors.
To demonstrate that the rates of decay of unstable nuclei can be measured, that the exact time that a certain nucleus will decay cannot be predicted, and that it takes a very large number of nuclei to find the rate of decay.
Have students look at the Glossary of Nuclear Science Terms for alpha and beta decay.Weigh out 80 candies for each group into cups before students arrive, as described in the Planning Ahead section above.Students should complete the Analysis section of the lab sheet, which will be used as part of their assessment.This is the second lesson in a three-lesson series about isotopes, radioactive decay, and the nucleus.The first lesson, Isotopes of Pennies, introduces the idea of isotopes.
If you count ten and weigh them, then multiply by 8, you will know how many grams of candy to weigh out for each group.