In this inquiry investigation, students conclude that the motion of the Earth is linked to the changes we observe such as the length of the day. Students learn about the reason behind the Earth's time zones. An optional water clock and sand clock... (View More) making activity supports this investigation. This investigation is from "Everyday Classroom Tools," a series of lessons focusing on the changing seasons and other aspects of our everyday existence. Each lesson contains information on cognitive development, an introductory inquiry activity, and an inquiry investigation. An introduction to inquiry in education and related educational resources (especially connections to folklore) are provided for educators. Differentiation is provided for K-2, grades 2-4 and grades 4-6. (View Less)