This chapter helps expand students’ thinking to how the apparent motion of the Sun in the sky changes throughout the year and the effects of those changes on the Earth, including the varying length of daytime and differences in the Sun’s height in the sky. These changes on the Earth are critical for understanding what causes the seasons, which is the major thrust of this chapter. A materials list, teacher background information, and outcomes are provided. This book selection includes the Table of Contents, About the Authors, Introduction, Acknowledgment, References, Internet Resources, and Index.