This lesson is designed to help students gain knowledge in using the MY NASA DATA Live Access Server (LAS) to obtain a microset of data, in using Excel to graph the data, then using the graphs to investigate the relationship between surface temperature and tropospheric ozone. They will also analyze changes in tropospheric ozone and then hypothesize about the consequences of these changes. The measurements are taken over Chattanooga, TN. Students are provided content-related activities to enhance background knowledge, and then are provided detailed instructions on how to download data from the MY NASA DATA Live Access Server (LAS) and to use Excel to graph the data. The lesson provides detailed procedure, related links and sample graphs, follow-up questions and extensions, and Teacher Notes.