How are some modern trains able to zoom down tracks at more than 300 miles (483 km) per hour? The secret has to do with magnetism Readers will learn key ideas behind this invisible force with this exciting book. The explanatory text is full of science curriculum-aligned concepts related to magnetism, including how magnets can be made, how magnetic poles work, and how magnets are used in industry and medicine. Colorful and lively images on each spread...