Discusses the origins and characteristics of the natural satellites that travel around seven of the nine planets in our solar system. This Book Is About Time 127 p. Discusses when, why, and how people started to measure time. Besides discussing the principles of relativity, the author explains concepts such as the relationship between time and space, gravitation and acceleration, the bending of light rays, and more. Traces the search leading to the discovery of the smallest bits of matter, and discusses recent developments. Gives instructions for performing a variety of experiments that illustrate some basic principles of chemistry.
Materials used are easily available.
Illustrated with color photographs. An information packed overview of the subject. Illustrated with diagrams and photographs. Includes instructions for conducting relatively simple demonstrations. Discusses the physical properties and formation of the snow and how it affects the plants, animals, and people of the Arctic.