How do eggs become chickens? How many planets are there in our solar system? How do seeds turn into plants? Fill your classroom library with answers to the (many!) common questions young students have with these 31 nonfiction books. From space to the sea, each title is packed with facts, photos, and on-level text that's just right for curious little minds. Use these books for both independent and guided reading lessons and to take a more in-depth look at a variety of subjects.