Did you know that the surface of earth is constantly moving? Or that the rocks that were here when the dinosaurs roamed the earth are made from the same materials as rocks today? These and other interesting facts about the rock cycle are presented in this book, part of the "Science Matters" series. Do not let the book's size fool you. A wealth on information is presented in its mere twenty-four pages. Readers will learn about the different types of rock, the rock cycle, how rocks form and change over time, and rock recycling. The information is presented in clear, well-written, yet spare language, and is accompanied by colorful photographs and drawings. All the typical elements of a good nonfiction book are here: an index, table of contents, glossary ("Words to Know") and where to go for additional information ("Surfing our Earth"), but this series goes a step further to include a "Science in Action" sectionin this case, creating sandstone rockwhich gives students some hands-on opportunities to apply and expand what they have learned. It also includes a "What Have You Learned?" section which helps reinforce the information by asking readers ten simple questions on the material presented in the book. This book is a must have for elementary science students and their teachers, and would be a great addition to a home-schooling parent's library. 2005, Weigl Publishers, Ages 8 to 12.