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Name: ______________________________ SCIENCE VOCABULARY for Weeks of Aug. 29 & Sept. 5 1. Active Volcano: A volcano that is erupting or has erupted within historical time and is considered likely to do so in the future (Grades 2-6) 2. Ash: Fine particles of rock dust blown from an explosion vent (Grades 2-6) 3. Vent: A vent is an opening at the Earth's surface of a volcanic conduit (Grades 2-6) 4. Crater: A steep-sided, usually circular depression formed by either explosion or collapse at a volcanic vent (Grades 2-6) 5. Dormant Volcano: A volcano which is presently inactive, but which may erupt again (Grades 2-6) 6. Eruption: The process by which solid, liquid, and gaseous materials are ejected into the earth's atmosphere and onto the earth's surface by volcanic activity; hot rocks and lava burst from a volcano (Grades 2-6) 7. Fault: A crack or fracture in the earth's surface (Grades 2-6) 8. Mantle: The zone of the earth below the crust and above the core (Grades 2-6) 9. Ring of Fire: The regions of mountain-building earthquakes and volcanoes which surround the Pacific Ocean (Grades 2-6) 10. Volcano: A vent in the surface of the Earth through which magma and associated gases and ash erupt; also, the form or structure, usually conical (cone-shaped), that is produced by the ejected material such as lava and hot rocks (Grades 2-6) 11.Vulcan: Roman god of fire and the forge, after whom volcanoes are named (Grades 5-6) 12. Ashfall: Volcanic ash that has fallen through the air from an eruption cloud (Grades 5-6) 13.Conduit: A passage (pipe) followed by magma in a volcano (Grades 5-6) 14.Fissures: Elongated fractures or cracks on the slopes of a volcano (Grades 5-6)