"Junior Science Experiments On File[trademark], Volume 4" provides 75 brand-new experiments and activities designed for elementary and middle school students in the major branches of science, including general science, life science, physical science, and Earth science. As in previous volumes, the experiments are written and designed in a manner that is easily understood by the layperson and enhanced by more than 250 black-and-white illustrations, tables, and diagrams. Each experiment requires the student to develop observation skills and follow the scientific method of problem solving. The binder also includes the expected outcome of the experiments so students, parents, and teachers can check their own results, and a useful appendix of 'Teacher's Hints' suggests specific classroom applications. A glossary is included, along with an index of this volume and a cumulative index of Volumes 1 to 4.