Amazon.com description: Product Description: The earth and the moon are always moving! Learn all about how the moon travels around the earth and why the moon looks different from night to night. The moon goes through different phases based on its position in relation to the earth and the sun. Vibrant images pair with easy-to-read text to keep students engaged from cover to cover. This reader also includes instructions for an engaging science activity and practice problems to further students' understanding of the earth and moon in a creative way. A helpful glossary and index are also included for additional support.