What are the different types of volcanoes? What causes an earthquake? What are plate tectonics? This encyclopedia will answer these and more hows and whats about the formation of volcanoes, where they occur and how earthquakes release massive amounts of energy. Learning is made simpler with accurate information, mesmerizing images and an extensive glossary of difficult words. Bonus: the book comes loaded with Isn't It Amazing-- a section of fun facts to keep you glued for more.