Hands-on activities reinforce concepts from the video Help students learn about ecological concerns with these dramatic, interactive labs. Students measure the pH of water samples, investigate the effects of acid rain on plants and soil, create acid rain posters, chart the path of acid rain from source to deposition, and estimate the contribution of autos to the problem of acid rain. 20 minutes. Includes: teacher's guide with interdisciplinary labs with materials and equipment for 30 students, and student activity sheets and tests. Grades 6-8.