Diseases, Environment & Ecology, Experiments & Projects, Reference 

"Gr4-7. Dozens of meticulously described experiments, a list of supplies and directions, and a detailed, clear explanation of what happens and why. The experiments are easy to set up and carry out."--SLJ. 128 pages, 150 b/w illus., 5 3/8 x 8 1/4. - from Amzon