Life on Earth depends on carbon. In fact, about 18.5 percent of a human body's mass is carbon! How carbon is taking in and given off through animals' breathing, the burning of fossil fuels, and more can be shown in the model known as the carbon cycle. Though this concept can be confusing, all readers have a chance to understand this concept through the text and simple diagrams in this book! Life's element -- Always moving -- Start with plants -- Stored in earth -- Releasing carbon dioxide -- In the atmosphere -- Keep cycling! -- The carbon cycle.

Includes bibliographical references and index.