Investigating Trophic Levels with Owl Pellets

Environmental Science students dissected owl pellets to determine what barn owls eat. They identified the different prey species they found using dichotomous keys, and constructed a food web based upon pellet prey analysis. They also performed calculations on cumulative total biomass and determined class prey percentages.

pH Experiment

The ChemCom Class tested the pH of several substances using different kinds of indicator solutions. These solutions change color with different pH values. Here they are blowing into water to produce carbonic acid, which they will test the pH of. Students use microchemistry spot tests to determine pH.