Need something to pique your student's interest in volcanoes? This 18-slide PPT delivers ALL the basics on volcanoes: how volcanoes form, types of volcanoes, where they form, type of magma and eruption. Content includes discussion of silica rich vs silica poor. LOTS of pictures in presentation.Vocab words included in presentation include: plate boundaries, subduction, hot spot, volcano, vent, crater, silica, basaltic magma, granitic magma, andesitic magma, rhyolitic magma, shield volcano, cinder