TECHNOLOGY
Welsbacher, Anne

Wheels and Axles

(4) K-3 Bridgestone Science Library series. These six easy-to-read science books, which explore simple machines, could easily have been combined into one volume. Each book describes how a particular machine works and offers examples of how it's used in everyday life. At books' end, a hands-on science experiment encourages students to investigate the physical concepts further. Color photos accompany the bland texts. Bib., glos., ind.

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