"This book takes readers on a dive to explore the amazing underwater habitats and landforms of Earth's oceans. Readers will take a journey from the deepest part of the ocean--the Mariana Tech--to the Mid-Ocean Ridge. They'll explore colorful coral reefs, and learn how they form. Photographs and diagrams help illustrate important earth science facts and concepts, and truly transport the reader to the underwater world"--From the publisher's web site.