For many years people wondered why the moon seemed to change shape. Now we know that the moon isn t changing, but rather what we can see of it is constantly changing. It, too, follows a pattern we see over and over again from month to month. Readers will love learning about the eight phases of the moon and why, even though the sun always lights the moon, we can t always see it! Science Content, Index, Words to Know, Detailed Table of Contents, Full-color photographs, Picture Glossary, Age Appropriate and Achievable Content.