Off the coast of Belize, tourists dive deep into an underwater hole. The Great Blue Hole looks at when and how this hole formed and what the future looks like for the area. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Kids Core is an imprint of Abdo Publishing, a division of ABDO.