In this book, students see the scientific method at work in a real-world situation. Readers practice close reading as they look for clues that will lead to a deeper understanding of erosion, sinkholes, and Earth's structure. The scientific method pushes students to apply critical thinking as they learn new methods of exploration and build on concepts they may already know. Additional tools, including a glossary and index, help students learn new vocabulary and locate information.|"Follow along with this exciting story to learn all about sinkholes, from how they are formed to what problems they can cause."-- Provided by publisher.|Index|Sources for further research|Glossary of key words|Informative sidebars|Table of contents|Author/Illustrator biography|The ability to use the scientific method or the NextGen Science process is key to carrying out experiments, taking measurements, or performing technical tasks. In these books, readers in real-world situations are tasked with following clues and using the scientific method or NextGen Science process to find out what happens. Informational text presents evidence and facts in the form of clues and side-bar details to help children develop critical thinking skills. A summary of the situation is included to show how each chapter contributes to the whole and for a solid understanding of the topic.