Explore Earth's dynamic, changing systems. Among the most highly regarded textbooks in physical geography, Robert Christopherson's best-selling Elemental Geosystems retains its unparalleled currency, accuracy, rich integration of climate change science, and dynamic multimedia program. Organized around the natural flow of energy, materials, and information, subjects are presented in the same sequence in which they occur in nature--an organic, holistic approach that is unique in this discipline. The 9th Edition features updated content to help student engagement and mastery. For introductory physical geography courses. Pearson eText allows educators to easily share their own notes with students so they see the connection between their reading and what they learn in class -- motivating them to keep reading, and keep learning. Portable access lets students study on the go, even offline. And, student usage analytics offer insight into how students use the eText, helping educators tailor their instruction. NOTE: This ISBN is for the Pearson eText access card. For students purchasing this product from an online retailer, Pearson eText is a fully digital delivery of Pearson content and should only be purchased when required by your instructor. In addition to your purchase, you will need a course invite link, provided by your instructor, to register for and use Pearson eText.