Have you ever noticed that magnets only stick to your refrigerator because of their metal backing? That's called magnetism! In this volume, readers learn how magnetism works, from a magnet's north and south poles to the invisible magnetic fields around different objects. They also explore Earth's magnetic field and the amazing way that different animals use it. Vivid photographs support each concept as accessible text guides readers to immerse themselves in the world of magnetism. Readers learn how important magnetism is in their everyday lives.