Most of Earth is made up of rocks, but how are they formed? This book introduces readers to the rock cycle, an incredible natural process that shapes the earth. Readers will learn about the different kinds of rocks--igneous, sedimentary, and metamorphic--and how they might change over time. Vibrant photographs and accessible hi-lo text work together to relay important information about the rock cycle. Fact boxes and a graphic organizer present exciting facts in a new way. Readers will love learning about this natural process that truly rocks!