In this book, early fluent readers will discover the STEM concepts behind motocross, including what momentum and friction are. Vibrant, full-color photos and carefully leveled text will engage young readers as they learn more about the science behind this exciting extreme sport. Take a Look! infographics aid understanding, sidebars present interesting, supplementary information, and an activity helps readers learn more. Children can learn more about the science behind motocross using our safe search engine that provides relevant, age-appropriate websites. Motocross also features reading tips for teachers and parents, a table of contents, a glossary, and an index. Motocross is part of Jump!'s Extreme Sports series.