Describes how magnets act on objects and other magnets. Explains how Earth is a magnet. Identifies historical discoveries about magnetism. Explores the relationship between electricity and magnetism.

"National Geographic school publishing"--P. [4] of cover.

Introduction: a magnetic light show -- Magnets and magnetism: the invisible force -- Exploring magnetism: unlocking the mystery -- Uses of magnets: pull toward the future -- Picture this: magnets all around -- Thinking like a scientist: inferring -- Hands-on science: make your own magnets -- Science notebook -- Glossary.