From the best-selling A+ series comes a volume that brings kids down to earth. Rocks and minerals, oceanography, the greenhouse effect . . . students learn about these and 27 other topics by conducting experiments using the scientific method (research, purpose, hypothesis, experimentation, conclusion). No expensive equipment is required, and each project could make your child a top contender at science fairs! Ages 11 and up. 234 pages, softcover from Wiley & Sons.