In this book, early fluent readers will learn about Mercuryís unique characteristics. Vivid, full-color photos and carefully leveled text engage young readers as they learn more about the planetís defining features, composition, atmosphere, weather, gravity, moons, exploration attempts, and more. Take a Look! infographics feature a diagram showing the planetís location in the solar system as well as a diagram showing the planetís composition. Sidebars present interesting, supplementary information, and an activity offers readers an opportunity to extend discovery. Children can learn more about the Mercury using our safe search engine that provides relevant, age-appropriate websites. Mercury also features reading tips for teachers and parents, a table of contents, a glossary, and an index. Mercury is part of Jump!ís Our Solar System series.