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Volcano's Test Marstin2017
Please study these questions for you Test on Friday!
Terms in this set (25)
Volcanic belts form along
the boundaries of Earth's plates
Before lava reaches the surface, the molten mixture of rock-forming substances, gases, and water from the mantle is called
What provides the force that causes magma to erupt to the surface?
dissolved gases trapped in the magma
If a volcano's magma is high in silica, the volcano will probably
Which of the following volcano hazards is made up of rocky particles about the size of a grain of sand?
A volcano that may erupt again at some time in the distant future is
When many layers of thin, runny lava build up a high, level area, the result is a
The huge hole left by the collapse of a volcanic mountain is called a
When ash, cinders, and bombs build up in a steep pile around a volcano's vent, the result is a
cinder cone volcano
What is the landform that forms when a mass of hardened magma is uplifted, causing the layers of rock to bend upward?
A mass of rock formed when a large body of magma cools inside the crust is called a
When groundwater heated by magma rises to the surface and collects in a natural pool, it is called a
In volcanic areas, groundwater heated by magma is a source of
The viscosity of magma depends upon its silica content and its
When magma reaches the surface, it is called
A major volcanic belt known as the _________________________ circles the Pacific Ocean
Ring of Fire
Many volcanoes form near ____________________ plate boundaries where oceanic plates return to the mantle
Molten rock and gas leave the volcano through an opening called a ________________.
A(an) ____________________ is an area where material from deep within the mantle rises and then melts
The bowl-shaped area around a volcano's central vent is called a(an) ____________________.
Groundwater heated by a nearby body of magma can spray from the ground under pressure, forming a(an) ____________________.
The resistance of a liquid to flowing is called
A __________________ is a weak spot in the crust where molten material, or magma, comes to the surface.
___________________ forms when lava cools very quickly, giving it a smooth, glossy surface like glass
_______________________ forms when gas bubbles are trapped in fast cooling lava, leaving spaces in the rock
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