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Chapter 18/19 Review Game Questions What are 3 types of volcanism? A: Convergent, Divergent, Hot Spots What do you call the part of a volcano that collapses when the magma chamber empties? A: Caldera What do you call cracks in the Earth’s crust that magma flows in? A: Fissure 2/3 of all volcanism occurs where? A: At Divergent Boundaries 90% of volcanoes occur where? A: Ring of Fire Circum Pacific Belt In an explosive volcano, describe the magma. A: A lot of gasses, Low temperature, high silica, high viscosity, rhyolitic What are the three types of strain? A: Compression, Sheer, Tension Which one can be found at strike-slip fault? A: Shear 3 seismic waves? A: P, S, Surface Q: How much increase in seismic energy is there for each successive number on the Richter scale? A: 32 Q: What do you call deformation that is temporary? A: Elastic deformation Q: What type of strain is occurring at convergent boundaries? A: Compression Q: Which type of fault occurs at transform boundaries? A: strike-slip Q: Describe the magma for a quiet eruption. A: Ex: low viscosity, low silica content (basaltic), high temperature, low amount of gases, high water content… Q: What do you call the tube-like structure that takes the magma from the chamber to the vent? A: Conduit Q: List the types of volcanoes from smallest to largest in size. A: Cinder-Cone, Composite, Shield Q: What do you call rapidly moving clouds of tephra that are mixed with hot, suffocating gases? A: Pyroclastic Flow. Q: What is the name of a major belt that is near Italy? A: Mediterranean Belt Q: What type of strain and plate boundary is a normal fault? A: tension, Divergent Boundaries Q: The intensity of an earthquake is taking a look at the amplitude of what type of wave? A: Surface wave Q: What type of Volcanism is not related to plate boundaries? A: Hot Spots Q: What was a famous example in the U.S. of the caldera? A: Crater Lake Q: What type of seismic waves are considered to be “compressional waves”? A: Primary waves Q: Each successive number on the richter scale represents an increase in amplitude by a factor of ___? A: 10 Q: Which type of seismic wave causes rocks to move at right angles? A: Secondary waves Q: What do you call the erupted materials of volcano? A: Tephra Q: Describe the magma attributes for an intermediately explosive volcano? A: andesitic, intermediate levels of silica, intermediate viscosity, some dissolved gases, medium temperature Q: Which type of volcano has the steepest slopes? A: Cinder-cone Q: What earthquake measurement is used to measure an earthquake’s intensity? A: Modified Mercalli Scale