Radioactive dating worksheet dating a shy guy yahoo
This fossil will have information containing how much of the parent and daughter isotopes were found as well as the accepted half-life of the radioactive isotope.Using a graph that relates percentages of parent isotope levels to number of half-lives students will determine the approximate age of the fossil.If such allergies occur, use a substitute material such as pennies.At the end of the lesson each student will be presented with his/her own fossil.Engagement Have students work in groups of 2-3 per group.The teacher may assign groups or allow students to pick with whom they would like to work.Note that the average of all of the groups' data more closely resembles the statistical probability of the change over time not the individual group's data.Assessment: Have students explain in their own words the concept of half-life in radioactive decay, demonstrate how the rate of radioactive decay and the buildup of the resulting decay product are used in radiometric dating of rocks, and compare and contrast individual statistical data results to the class average of various statistical data results to determine reliability and predictability of the two groups.
Assessment: Monitor students' work to check that they are carrying out procedures carefully, making observations, and recording data accurately. Discuss with the class as a whole the student responses to the end of the activity questions from the "Engagement" and "Exploration" sections of the learning cycle.During the discussion explain to students how this decay is at a set rate for a given element and that by measuring the percent rate of decay scientists can accurately predict the approximate age of a fossil or rock.This is not to be confused with the statistical probability of the change in the population over time as demonstrated with an individual group's data during the M&Ms activity.The small beads and M&Ms could be choking hazards or a projectile hazard.Therefore, the teacher should state and enforce a no throwing rule of materials.
Students may confuse this random change of events with the non-random decay of radioactive isotopes.