Foundations of Physics

Using straightforward yet clear text in a large font, this installment in the Foundations of Physics series (6 titles) offers a basic introduction to the physical concepts of light and sound. Starting with light, it explains how light travels in waves, as well as such related terms as reflection and refraction, all bolded and defined in the glossary. The section on sound builds upon light, describing how it, too, travels in waves and how different substances (solid, liquid, and air) affect how fast sound moves. This section ends with a brief explanation of how light and sound often work together. Aiding comprehension are crisp, colorful photos with labeled terms, a chart of the visible light spectrum, and sidebars with added facts. A culminating activity reinforces the concepts for beginning science learners.