How do tiny bugs get into oatmeal? What makes children look like-or different from-their parents? Where do rotten apples go after they fall off the tree? By presenting everyday mysteries like these, this book will motivate your students to carry out hands-on science investigations and actually care about the results. These 20 open-ended mysteries focus exclusively on biological science, including botany, human physiology, zoology, and health. The stories come with lists of science concepts to explore, grade-appropriate strategies for using them, and explanations of how the lessons align with national standards. They also relieve you of the tiring work of designing inquiry lessons from scratch.