Chapter 3 Volcanoes

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Can you name the Chapter 3 Key Terms?

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DefinitionTerm
Boundary where two plates move together
A steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening
As the amount of silica in magma increases, the viscosity of the magma _____.
A weak spot in the crust where molten material, or magma, comes to the surface
Magma that forces itself across rock layers and then hardens
The lower the viscosity of a liquid, the ______ it flows.
When magma reaches the surface, this is what it's called
A tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials
When magma squeezes between horizontal layers of rock, it forms this
Pebble-sized particles that come out of a volcano
Ability to burn and ability to reach are this type of property
U.S. state that formed over millions of years as the Pacific plate drifted over a hot spot
As the temperature of magma decreases, its viscosity _____.
The less silica magma contains, the _____ its viscosity.
Lava that is cool and slow moving
As the temperature of magma increases, its viscosity _____.
A fountain of water and steam that erupts from the ground
Any property that produces a change in the composition of matter
Boundary where two plates move apart
Where volcanic belts form
Magma that is low in silica produces this type of eruption
Fast-moving, hot loava that has low viscosity
A natural pool of water that is heated by geothermal activity
A volcano that may awaken in the future and become active
The resistance of a liquid to flowing
DefinitionTerm
Type of volcano that is erupting or has shown signs that it may erupt in the near future
A long tube in the ground that connects the magma chamber to Earth's surface
Forms when magam hardens in a volcano' pipe
The huge hole left by the collapse of a volcanic mountain
An area where material from deep within the mantle rises and then melts, forming magma
This occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs
Opening in a volcano where molten rock and gas leave
Pocket beneath a volcano where magma collects
Fine, rocky particles as small as a speck of dust that come out of a volcano
Magma that is high in silica produces this type of eruption
The factor that the viscosity of magma depends on
________ among a liquid's particles causes liquids to have different viscosities.
The area covered by lava as it pours out of a vent
Any characteristic of a substance that can be observed or measured withough changing the composition of the substance
A major volcanic belt formed b y the many volcanoes that rim the Pacific Ocean
A substance made of two or more elements that have been chemically combined
A dead volcano that is unlikely to erupt again
A bowl-shaped area that may form at the top of a volcano around the central vent
Large pieces that come out of a volcano
Density, harndess, melting point, boiling point, and magnetism are all this type of property
Magma beneath Earth's surface heats underground water
A substance that cannot be broken down into other substances
The greater the viscosity of a liquid, the ____ it flows.
A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions.
A mass of rock formed when a large body of magma cools inside the crust

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