How hot is this tiny planet? Spark early readers'' natural curiosity about planets with this inquiry-based nonfiction approach to Mercury. You know Mercury is the closest planet to the Sun. But did you know it''s only a little bigger than Earth''s Moon? Or that it has more craters than any other planet? Perfect for self-selection and early reports, this question-and-answer book covers Mercury''s appearance and features, plus missions to the planet. A Quick Facts chart provides fast facts while simple infographics support visual learners. A Stay Curious! Learn More feature encourages kids to keep asking questions while doubling as a mini media literacy lesson on research skills. Includes glossary and index.