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3.1 Volcanoes 3.2 Properties 3.3 Volcanic 3.4 Volcanic 3.4 Volcanic
& Plate Tectonics Of Magma
Eruptions
Landforms
Landforms
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Volcanic belts form along the
_____________of Earth’s plates.
boundaries
The formation of the Hawaiian
Islands is one example of volcanoes
forming over a___________
Hot spot.
Before lava reaches the surface, the
molten material is called
magma.
The volcanoes along converging
oceanic plate boundaries may
form
an island arc.
Volcanoes that form along a
mid-ocean ridge occur at
a(n)_________________.
diverging plate boundary.
The viscosity of magma
depends upon its silica
content and its
temperature.
__________is fast-moving, hot lava.
Pahoehoe
The major ingredient of magma is __.
Silica.
What can be used to identify a
substance or to predict how it
will behave?
physical and chemical properties
The greater the viscosity of a
liquid, the _____ it flows.
slower
The long tube in the ground that
connects the magma chamber to
Earth’s surface is called the
_________________.
pipe.
If a volcano’s magma is high in silica,
the volcano will probably _________.
erupt explosively.
Which of the following volcano
hazards is made up of rocky particles
about the size of a grain of sand?
volcanic ash
The main hazard from a quiet
volcanic eruption is ______.
lava flows.
Which type of rock would you expect
to form as the result of an explosive
eruption?
.
pumice
When groundwater heated by
magma rises to the surface and
collects in a natural pool, it is called a
_____________.
hot spring.
In volcanic areas, groundwater
heated by magma is a source of ____
geothermal energy.
Tall, cone-shaped mountains in
which layers of lava alternate with
layers of ash are called _____
composite volcanoes.
When many layers of thin, runny
lava build up a high, level area, the
result is a _______.
lava plateau.
What is the landform that forms
when a mass of hardened magma is
uplifted, causing the layers of rock to
bend upward?
dome mountain
A mass of rock formed when a large
body of magma cools inside the crust
is called a ________.
Batholith.
The huge hole left by the collapse of a
volcanic mountain is called a ___.
caldera.
When ash, cinders, and bombs build
up in a steep pile around a volcano’s
vent, the result is a _______.
cinder cone volcano.
When magma hardens in a volcano’s
pipe, the result will eventually be a
landform called a _______.
volcanic neck.
Magma that forces across rock layers
hardens into a _.
dike.