The purpose of this assessment probe is to elicit students’ ideas about processes that change Earth. The probe is designed to find out if students recognize that the sand on many beaches results from weathering of rock on mountains, erosion, and deposition. It is best used with grades 5–12 and is important that students understand that the sand in this example is made up of very tiny pieces of white rock. A materials list, teacher background information, references, assessment, and outcomes are provided. This book selection includes the Table of Contents, Foreword, Preface, Acknowledgments, About the Authors, Introduction, and Index.