Amazon.com description: Product Description: Bursting volcanoes, cooling magma, crystals, and granite: this title covers everything igneous rock related. Written for a lower-elementary-level audience, the science behind the rock cycle and the formation of igneous rocks is presented in clear and easy-to-understand language. Special Think About It and Compare and Contrast sidebars provoke critical thinking skills in line with Common Core standards for the target grade levels. With special sections devoted to household uses of igneous rocks that readers might recognize and bright photographs of volcanoes in action, sparkly crystals, and shiny obsidian, this book will turn every reader into a junior geologist!