Dr. Mark Norris (left) and Environmental Science major Heather Bowie attended the 3rd annual Ag and STEM Summit, part of the Maryland STEM Festival taking place across the state Oct. 11 – Nov. 10. Prof. Norris and Heather demonstrated cellular respiration and leaf photosynthesis using the Li-Cor portable infrared gas analyzer to Springfield Middle School students in the STEM Magnet program.