The purpose of this assessment probe is to elicit students’ ideas about magnetism. It is designed to reveal whether students think air is necessary for magnetic interaction. Because some students think gravity affects magnetism and also believe gravity is affected by air, the probe also reveals ideas about the effect of gravity on magnetism. This probe is best used with upper elementary, middle, and high school students. A materials list, teacher notes, standards, assessment, safety notes, and references are provided. This book selection also includes the Table of Contents, Preface, Acknowledgments, About the Authors, Introduction, and Index.