In-depth guided inquiry investigation of LD50 (Lethal Dose 50%) appropriate for AP Environmental Science students. Set up once, use year after year. Instead of paying for and killing real animals (crickets, brine shrimp, daphnia, etc.), 'kill' some cartoon mice. In this lab, students collect data from mice exposed to various concentrations of 4 substances, calculate mortality %, predict and graph LD50 results, extrapolate to human dosages, answer thought-provoking questions, and complete practic