問題一覧
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It is a vent, hill or a mountain that erupts, releasing molten rocks, rock fragments, and gaseous materials onto Earth’s surface
Volcano
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It is where magma passes through from the magma chamber to reach Earth's surface.
Main Vent
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This is a large reservoir that stores molten rock (magma) prior to eruption.
Magma Chamber
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It is a bowl-shaped depression produced by volcanic activity and explosion.
Crater
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This is the stream of molten rock flowing out of the crater.
Lava Flow
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This is an alternative smaller outlet where magma escapes to reach Earth's surface.
Secondary Vent
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This is formed when lava and ashes escape from smaller vents; it is also known as a parasitic cones.
Secondary Cone
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It is formed when thick volcanic ashes are discharged into the atmosphere caused by violent explosion or eruption of the volcano.
Ash Cloud
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It is a mixture or rocks, minerals, and slass particles expelled during a volcanic eruption.
Ash
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What are the Anatomy of a Volcano
Main Vent, Magma Chamber, Crater, Lava Flow, Secondary Vent, Secondary Cone, Ash Cloud, Ash
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A volcano that is famous for its almost perfect cone shape.
Mayon Volcano
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Is just one of the appearances of a volcano.
Cone Shape
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Volcanoes are formed from pyroclastic fragments and volcanic ashes that form and solidify around the main vent to form a cone, which can be either circular or oval.
Cinder Cone
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It is also known as stratovolcanoes
Composite Volcano
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Composite is also known as?
Stratovolcanoes
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It is a volcano that have acidic and sticky lava, which allows the lava to solidify without traveling very far.
Composite Volcano
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This volcano are formed from non-acidic basaltic lava flows of high viscosity producing broad sloping sides and shield-like structures.
Shield Volcano
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This is most well-known shield volcanoes
Hawaii
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Types of Volcanoes according to Shape
Cone Shape, Cinder Cone, Composite Volcano, Shield Volcano
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These volcanoes have erupted during historical times
Active
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These volcanoes are active but not erupting: however, they are expected to erupt anytime soon.
Dormant
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These volcanoes have not had any eruption in the past 10 000 years and are expected not to erupt anymore in the future, these volcanoes have been intensively weathered and eroded.
Extinct
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Types of Volcanoes According to Eruptive History
Active, Dormant, Extinct
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The magma chamber is being filled with magma. An increase in seismic activity and steam or smoke coming out from the volcano can be observed.
Preparation Phase
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The pressure will start to build up inside the magma chamber and the energy starts to increase for eruption.
Eruption Phase
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After the eruption, the magma chamber is now empty, which may trigger the walls of the conduit to weaken and to collapse into a crater or a caldera.
Ending Phase
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Phases of Volcanic Eruption
Preparation Phase, Eruption Phase, Ending Phase
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This involves the outpouring of basaltic magma that is relatively low in viscosity and low in gas content.
Effusive Eruptions
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This involve magma of high viscosity and high gas content.
Explosive Eruption
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This is were fluid basaltic lava is thrown into the air, creating a lava fountain or lava flows.
Hawaiian
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There is a burst of glowing lava due to the bursting of gas bubbles at the vents of the volcano.
Strombolian
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This is a hardened chunks of bubbly lava
Scoria
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This is were the eruption is short, explosive, and violent.
Vulcanian
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This is the most violent among all types of volcanic eruptions. It releases huge amounts of gases and ashes at great speeds.
Plinian
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This is a steam-driven explosion, whereas magma heats the surface or ground water, the water begins to boil or directly produce steam that causes the explosion.
Phreatic
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involves the eruption of magma that reacts to external water
Phreatomagmatic
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Types of Volcanic Eruptions
Effusive Eruptions, Explosive Erruptions, Strombolian, Vulcanian, Plinian, Phreatic, Phreatomagmatic, Hawaiian
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This refers to magma (molten rock) that has been expelled onto Eartis surface.
Lava
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This refers to the pyroclastic materials and rock fragments that are being expelled during volcanic eruptions.
Tephra
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Pyroclastic materials that are already solid when ejected during eruptions
Volcanic Blocks
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This means Little Stones in Latin
Lapillin
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A mixture of powder-sized rocks, minerals, and gas particles
Vulcanic Ash
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A mass of molten rock, large, dense pyroclastic rocks that cool in the air before they reach the ground
Volcanic Bombs