Tornadoes are unstoppable forces of nature. In this title, readers will learn why tornadoes occur, how tornadoes are classified, and how to survive a tornado. Historic tornadoes, including the Joplin, Missouri, tornado in 2011 and the Greensburg, Kansas, tornado in 2007 are also discussed. Features include full-color photos, easy-to-read text, a table of contents, a glossary, and an index. Aligned to Common Core Standards and correlated to state standards. A&D Xtreme is an imprint of Abdo Publishing, a division of ABDO.