... 3 RADIOACTIVE DECAY, AGE DATING, GEOLOGIC TIME _____________________________________ A. Radioactive Decay OBJECTIVE: This activity illustrates the concepts of radioactive decay of elements, half-life and how the age of a radioactive-element-bearing rock is determined. The exercise also is an opportunity to review/practice the basic science skills of observation (measurement), analysis (graphing), and inference. See pages 284-287 in Lutgens and Tarbuck, 2014 (pages 249-252, L&T, 2011).
MATERIALS: You will need 50 pennies, 50 matches and a shoebox (or similar box, a square box with lid works best) to complete this activity.
Part I – Place the coins in the box with all coins turned to "h...