This is an interactive simulation of a series of labs I run over the course of several weeks (unimaginatively) called, "Penny Labs". In the series, students make, "clean", "green", "silver", "gold", and "hollow" pennies, collecting tangible examples for demonstrating the difference between Physical and Chemical Changes. This simulation follows the process from measurement, through data crunching to graphing, and analysis. Students run through all the labs in their entirety. The file can be pro