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Multiple Choice, Fill-in-the-Blank, Short Answer 1) The outer boundary of the Pacific plate is nicknamed ______________________ because of the number of Earthquakes and Volcanoes that occur there. a) Ring of Fire b) Ring of Champions c) Lord of the Rings d) Ring around the Rosie . 2) ___________________ - mixture of hot gases, ash, cinders, and bombs that explode out of a volcanic eruption. a) Pryoclastic flow b) Aa c) Pyromaniac d) Pahoehoe . 3) ________________– Pressure builds in the magma chamber due to increases in magma and expanding gases until it flows or explodes out of a vent. a) Crater b) Lava flow c) Viscosity d) Eruption . 4) What is lava flow? area covered by lava after eruption 5) A _______________ is a weak spot in the crust where molten material, or magma, comes to the surface. a) island b) volcano c) valley d) rift . 6) The Tube connecting the magma chamber to the Surface is called the ______________ a) central vent b) pipe c) shaft d) side vent . 7) What stage of the life cycle is a volcano in if it has not erupted in 100's of years but it may erupt again without warning? a) mid-life crisis b) dormant c) active d) extinct . 8) __________________ are Wide, gently sloping mountains with quiet Eruptions that gradually build lava layers on the mountain walls a) Lava Plateau b) Cinder-Cone Volcano c) Shield Volcano d) Composite Volcano . 9) How does Temperature effect the Viscosity of Magma? high temp = low viscosity 10) A Fluids resistance to flow is called ____________ a) viscosity b) temperature c) visualization d) silica . 11) _______________ is easy flowing, quiet erupting lava with High Temperature, Low Silica content, Low Viscosity Aa 12) The Bowl-shaped opening at the top of the volcano created by the eruption of the volcano is called the ____________. a) vent b) pipe c) crater d) chamber . 13) ________________________ are Larger, cone-shaped Mountains that Alternate between Quiet and Explosive Eruptions a) Cinder-Cone Volcano b) Lava Plateau c) Composite Volcano d) Shield Volcano . 14) The majority of Volcanoes on earth are located around the edge of which Tectonic Plate? Pacific Plate 15) An Opening where magma leaves the volcano and turns to lava is called a ____________________ a) crater b) vent c) chamber d) pipe . 16) Magma with [low Silica content, [low Viscosity, and [high temperatures cause volcanoes to have Quiet Eruptions. 17) ____________________ – Characteristics that can be observed using your senses or measured with tools. a) Physical Properties b) Chemical Properties c) Composition d) Silica Content . 18) ________________________ is Explosive Erupting lava with High Silica content, Low Temperature, High Viscosity a) Aa b) Pahoehoe c) Rhyolite d) Patagonia . 19) ________________________ are Steep, cone-shaped hills or mountains that erupt violently spewing out of ash, cinders, and bombs Cinder-Cone 20) Magma with [high Silica content, [high Viscosity, and [low temperatures cause volcanoes to have Explosive Eruptions. 21) The Pocket of Magma underneath the Volcano is called _____________ a) pipe b) crater c) magma chamber d) central vent . 22) Area where magma from deep within the mantle melts through thin oceanic crust and forms islands is called a/n ____________________. a) hot spot b) mid-ocean ridge c) convergent boundary d) deep ocean trench . 23) What stage of the life cycle is a volcano in if it is Erupting or showing signs that it may erupt? a) dormant b) active c) extinct d) finding itself . 24) _________________ is a term that means what something is made of. It is a chemical property. a) Viscosity b) Observation c) Composition d) Compound . 25) Which type of plate boundary forms long, quiet erupting volcanoes called Mid-Ocean Ridges? a) Divergent b) Ring of Fire c) Transform d) Convergent . 26) ________________ form when an Oceanic plate collides with a Continental plate and causes the most violent Volcanoes. a) Lava plateaus b) Shield Volcanoes c) Subduction Zones d) Mid-Ocean Ridges . 27) What are the 2 types of Vents? Describe each. Side and Central