My name is Kevin Tarr and I am doing a project seeing how vehicles affect snow through an experiment. The first part of my experiment is collecting the samples and measuring their pH using a program called Logger Lite 1.2 TM. The second part of my experiment is to filter the samples and weigh the left over debris on a special scale that is built to weigh materials with small masses. The reason I am doing this experiment is because 2007 is National Polar Year.