SCIENCE
(4) 4-6 Essential Physical Science series. The authors cover the basic physics of these two forms of energy, including explanations of how we see and hear and the ways in which humans use related technologies. Cluttered, brightly colored layouts feature the main text and additional facts in asides, boxes, and captions to the photos and diagrams. Several activities exploring sound and light concepts are included. Reading list, websites. Glos., ind.

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