of both sciences and shows how they relate to one another. Text and illustrations are combined in an easy-to-understand yet scientifically accurate context. The related concepts of energy and heat are explained in terms of their uses in both simple and complex machines. Also explained are the characteristics of liquids, gases, and solids. Other subjects covered are the characteristics of sound, light, electricity and magnetism, atomic structure, the periodic table of elements, and simple chemical reactions. Full-color photos, artwork, and diagrams on every page complement clear textual descriptions.

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