In this book, young readers will learn about one of nature's powerful, earth-shaping forces - glaciers! Engaging, easy-to-read text describes how glaciers form, move, and, over time, create magnificent valleys and lakes. Covered in detail are the two main types of glaciers - continental glaciers and mountain glaciers. Fascinating formations such as cirques, arêtes, horns, and moraines are introduced. Also explained are the topics of melting glaciers, global warming, and conservation. Facts, a glossary with phonetic spellings, and an index are included as well.