Explore the fascinating world of science through an in depth view of high interest topics. The up-to-date method explains the basic facts while exploring a wide range of subjects through easy-to-read text, superb illustrations and photographs. Learn how science has developed and the tremendous influence it has on our everyday lives. Practical projects that are fun and easy encourage the reader to enjoy science and enhance their understanding of the principals being discussed. Sound explores what sound is and how we interpret things that we hear and feel.