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Volcano Features and Introduction to Volcanology

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Volcano Features and Introduction to Volcanology

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Questions and Answers

A ______ on the crust

rupture

Lava - Rock or ______ expelled from a volcano

magma

Composite Cone - 'Mixed volcano' have layers of built up lava and volcanic ______

ash

Caldera - Volcano depression but much ______

larger Signup and view all the answers

Dikes are barriers or obstacles in a volcano, while ______ are known as intrusive sheets

sills Signup and view all the answers

Tephra Fall is fragmented material that consists of ______

pumice Signup and view all the answers

Lahar is mudflows, a flowing mixture of volcanic debris and ______

water Signup and view all the answers

PHILVOCS stands for Philippine Institute of Volcanology and Seismology, ______ of the government

agencies Signup and view all the answers

Match the volcano feature with its description:

Crater = Basinlike depression over a vent Vent = Opening through which an eruption takes place Conduit = Channel or pipe conveying liquid materials Throat = Entrance of volcano Signup and view all the answers

Match the type of volcano with its description:

Active = Can erupt anytime and often Dormant = Hasn't erupted for a long time but could at any time Extinct = Hasn't erupted for a very long time, unlikely to erupt again Shield Volcano = Looks like a round, flat shield on the ground Signup and view all the answers

Match the type of cone with its description:

Cinder Cone = Shaped like a cone with steep sides Composite Cone = 'Mixed volcano' with layers of built up lava and volcanic ash Shield Volcano = Looks like a round, flat shield on the ground Active Cone = Can erupt anytime and often Signup and view all the answers

Match the volcanic phenomenon with its description:

Pyroclastic Flow = Fast moving currents of hot gases and rock Lahar = Mudflows, a flowing mixture of volcanic debris Ash Cloud = Expelled from the atmosphere Volcanic Bombs = Chunks of lava blasted from the air Signup and view all the answers