First, students visualized the concepts of radioactive decay and half-life in an activity using M&Ms™ and marshmallows.M&Ms™ were shaken in a bag, poured out on the table, and then removed to the decayed pile if they did not show their “m” label.Some commented specifically that food made the activity more accessible on a sensory level. 131© Copyright 2010 The Geological Society of America (GSA), all rights reserved.This use of varied modalities for learning gives benefit to a wide range of student learning styles. 49Innovations in Teaching Earth-System Science for the K12 Classroom Sheraton Baltimore City Center: Pratt A/B PM- PM, Monday, 15 March 2010Geological Society of America Abstracts with Programs, Vol. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes.This activity enabled visualization of the change from one isotope to another and the amount of time involved.
Geologists draw on it and other basic principles ( to determine the relative ages of rocks or features such as faults.
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It’s based either on fossils which are recognized to represent a particular interval of time, or on radioactive decay of specific isotopes. Based on the Rule of Superposition, certain organisms clearly lived before others, during certain geologic times.
After all, a dinosaur wouldn’t be caught dead next to a trilobite.