 The Following Are Some Excellent Websites. Just Click on any one of these links: USGS Home page Earthquake Glossary Volcanic Types Plate Tectonics - Graphics Ring of Fire This Dynamic Earth Understanding Plate Motion USGS Learning Center Plate Tectonics Global Volcanism Program Global Volcanism Program Earthquake Learning Center This link is for Volcanoes of the World: List of Volcanoes This link is for Volcanoes of the United States: List of Volcanoes 