1) It is the natural process of volcanoes’ activities. a) Diastrophism b) Earthquake c) Volcanism d) Weathering 2) It occurs when hot runny basaltic magmas reach the surface as dissolved gases and lava escape easily. a) Effusive b) Explosive c) Phreatic d) Phreatomagmatic 3) The opening of the volcano is _______ a) Vent b) Crater c) Slope  d) Base 4) These are molten rocks ejected beneath the surface of the Earth. a) Ashes b) Lahar c) Lava d) Magma 5) It has steep slopes and considered as the simplest, constructed from semi-fluid lava ejected from the vent. a) Composite b) Cinder c) Shield d) Hill 6) It is a volcano found in Albay which has a perfect cone and considered as stratovolcano. a) Mount Apo b) Mount Mayon c) Mount Pinatubo d) Mount Taal 7) It is considered as the most violent eruption exemplified by fragmentation of highly gas charged and viscous magma. a) Strombolian b) Phreatic c) Vulcanian d) Plinian 8) It serves as the storage of magma. a) Ash Conduit b) Sill c) Ash Cloud d) Magma Chamber 9) There are volcanoes underwater a) True b) False 10) It is an instrument used to determine the intensity of the volcanic eruption. a) Barometer b) Rain Gauge c) Seismograph d) Volcanic Explosivity Index

Quiz: Volcanoes

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