Discover The Solar System Grades 46 Author:Norma O'Toole, Cindy Barden The activities in this book explain elementary concepts in the study of the solar system, including orbits, the sun, the moon and moon phases, planets, seasons, and day and night. General background information, suggested activities, questions for discussion, and answers are included. Encourage students to keep completed pages in a folder or not... more »ebook for further reference and review.« less