Get ready to explore the earth! Beginning at the center of the earth, the core and moving outward to the crust, followed by the hydrosphere, atmosphere, biosphere and lithosphere. Learn how volcanoes are formed, and what tectonic plates are! The learning continues with landforms . The rock cycle follows: igneous, sedimentary, metamorphic. How do they change forms? Find out inside! The geologic journey ends with the water cycle and a reminder to keep our planet clean! An excellent addition to every child's library and vocabulary. Pronunciation guides and review quizzes enable retention of new information and terms. Young readers become geologists by the close of the final page! FOR AGES 3 to 12.