FUN AND GAMES

Seventeen photos illustrate aspects of physics, medicine, ecology, etc. Several are stop action—e.g., a bouncing ball and popcorn popping. Infrared and thermogram images show heat distributions of a landscape and a runner's foot; charged- particle pictures of the brain reflect its response to speech and to music. Most of the accompanying explanations are on-target, describing how the photos give scientific insights; some are confusingly terse or describe principles that are not really related to the pictures. Entertaining and instructive, but uneven. (Nonfiction. 8-12)