You will need to read through the entire procedure for this part to determine what observations you are trying to collect. Questions for students, with suggested answers:īefore beginning the activity, create your own data table for the entire activity, dividing it up by parts. This activity uses these basic concepts, so if necessary please review them in advance with your students: If you don’t have access to a spectrophotometer, encourage students to create control solutions so they can try to match the color of the test tube at a particular point during the reaction - just eyeballing it is good enough for students to get the idea. If you have a spectrophotometer available for your class to use, you can make the chemical reaction portion of this activity more precise by recording absorbance over time. Cell phones with video recording capabilities and timers.Pennies (16 per group try to have the number of student groups be some power of 2, like 8 or 16).Activity Guide for Students: Exploring half-life.Procedural overview: Simulate exponential radioactive decay and half-life with pennies and a food coloring/bleach chemical reaction to understand the exponential radioactive decay of carbon-14. Purpose: To understand the meaning and implications of radioactivity, exponential decay and half-life.
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