Destructive and awe-inspiring, the eruption of a volcano is a dramatic demonstration of nature's power. However, there is much more to the process than what we see on the surface. Readers will explore the geological structure that makes volcanic activity possible and follow the sequence of events that culminate in an eruption. In addition to eruptions, this text examines other geothermal activities, the benefits of which may surprise young readers. It includes vivid photographs to heighten interest and clear diagrams to enhance comprehension.