Explains how and why volcanoes form, looks at what happens when a volcano erupts, describes active and inactive volcanoes, and examines the damage caused by volcanic eruptions. Includes a glossary and references.
Explains some examples of electricity in nature, early experiments with electricity, the development of use of electric power, and possibilities for the future.
Discusses the discovery of atoms and how they work, nuclear energy and weapons, nuclear radiation and its medical uses, atomic clocks, and other applications.
Discusses tides and tide pools and the moon's influence on them. The plant and animal life in tide polls is described, as well as ecological damaged cause by man.