Young researchers will dive into the fantastic world of science with this authoritative one-stop reference book. Available for the first time in paperback, this packed with all the information kids want to explore. Grouped into five clear sectionsNumbers, Energy and Matter, Materials, Living Things, and Spacethis encyclopedia includes activities, key vocabulary, web links, and tons of fascinating trivia that will keep kids coming back for study and for pleasure. This is a trusty reference for the home or classroom.