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What is a volcano?
A volcano is a weak spot in the crust where molten material, or magma comes to the surface.
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What is magma?
Magma is a molten mixture of rock-forming substances, gases, and water from the mantle.
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What is lava?
Lava is magma on earth's surface.
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What is the Ring of Fire?
One major volcanic belt formed by the many volcanoes that rim the Pacific Ocean.
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Where do volcanic belts form?
Volcanic belts form along the boundaries of earth's plates.
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What is an island arc?
An island arc is when the resulting volcanoes create a string of islands.
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What is a hot spot?
A hot spot is an area where material from deep within the mantle rises and melts, forming magma.
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How does a volcano form above a hot spot?
A volcano forms above a hot spot when magma erupts through the crust and reaches the surface.
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What is an element?
An element is a substance that cannot be broken down into other substances.
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What is a compound?
A compound is a substance made of 2 or more elements that have been chemically combined.
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What is a physical property?
A physical property is any characteristic of a substance that can be observed of measured without changing the composition of the substance.
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What is chemical property?
A chemical property is any property that produces a change in the composition of matter.
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What is viscosity?
Viscosity is the physical property of how liquids flow.
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What happen when liquids have different viscositys?
Some liquids flow easier then others.
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What does the viscosity of magma depend on?
The silica content and temperature.
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What is silica?
Silica is a compound made of particles of the elements oxygen and silicon.
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What is Pahoehoe?
Pahoehoe is fast moving hot lava that has a low viscosity.
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What is aa?
Aa is cool lava that moves slowly with a high viscosity.
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What is the magma chamber?
The magma chamber is where magma collects in a pocket called a magma chamber.
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What is the pipe?
The magma moves upward through a pipe, a long tube in the ground that connects the magma chamber to the earth's surface.
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What is a lava flow?
A lava flow is the area covered by lava as it pours out of a vent.
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What is a crater?
A crater is a bowl shaped area that may form at the top of a volcano around the central vent.
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What can geologists classify volcanic eruptions as?
They classify them as quiet or loud eruptions.
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What is a pyroclastic flow?
A pyroclastic flow occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs.
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What is an active volcano?
An active volcano is a volcano that is erupting or shows signs of erupting in the future.
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What is a dormant volcano?
A dormant volcano is a volcano that is to awaken in the future and become active.
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What is an extinct volcano?
An extinct volcano is a dead volcano, unlikely to erupt again.
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What is a shield volcano?
A shield volcano is a wide gently sloping mountain.
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True/False A cinder cone volcano is a tall coned shaped mountain.
False A cinder cone volcano is a volcano that may produce ash, cinders, and bombs and a cone shaped mountain.
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A composite volcano is
a. A wide gently sloping mountain
b. a tall cone shaped mountain
c. a type of plateau
Answer:B
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A_______ _________ is when different levels of lava can form high plateaus.
Lava Plateau
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A _______ is a huge hole left by the collapse of a volcanic mountain.
Caldera
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True/False Volcanic Necks form when magma hardens in a volcano's pipe.
True
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A ____ is magma that forces itself across rock layers.
dike
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A sill is
B.
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What is a batholith?
A boatholith is a massof rock formed when a large body of magma cools inside the crust.
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In _______ _________ magma a few kilometers beneath earth's surface heats underground water.
Geothermal energy
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How does a hot spring form?
A hot spring forms when groundwater is heated by a nearby body of magma or by hot rock deep underground.
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A geyser is:
B.
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