Groovy Gravity

Rena Korb

2008年1月 · Abdo Publishing Group · 讲述者：Robert Rance

关于此有声读物

Learn about gravity in these easy-to-read books. Gravity's force, moon's orbit, and their effects are explained with simple text and matching illustrations. A science activity, fun facts section, glossary, and index aid students in learning about the gravity pulling on them. Special thanks to content consultant Paul Ohmann Ph.D.