Find out all about Planet Earth by asking some clever questions! What makes the ground shake? How hot are lightning bolts? And what IS at the end of a rainbow? Discover the answers to these questions and much more in Clever Questions: Planet Earth! Discover the world with these fun, child-friendly question and answer books on high-interest topics. Along the way, readers will discover fascinating facts to remember and share, as well as learn key science and geography information. Books in the series: Animals Dinosaurs How Things Work Human Body Planet Earth Rainforest Robots & AI Space