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WorksheetsVolcanoes
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
The viscosity of magma depends on its temperature and
a)
silicon content
b)
silica content
c)
mineral makeup
d)
magnetism
2.
Cool, slow moving, high viscosity lava is called
a)
Aa
b)
Pahoehoe
c)
Lava
d)
magma
3.
What is number 1?
a)
Pyroclastic flow
b)
Lava flow
c)
Vent
d)
Ash cloud
4.
What is number 7?
a)
Pyroclastic flow
b)
Lava flow
c)
Magma
d)
Ash, cinders, and bombs
5.
What is number 4?
a)
Pipe
b)
Vent
c)
Magma Chamber
d)
Crater
6.
What is number 6?
a)
Pipe
b)
Vent
c)
Crater
d)
Magma Chamber
7.
What type of volcano forms from only quiet eruptions?
a)
Composite
b)
Cinder Cone
c)
Shield
8.
What type of volcano is shown above?
a)
Strato
b)
Cinder Cone
c)
Shield
9.
A large hole left by the collapse of a volcanic mountain is called a
a)
Crater
b)
Caldera
c)
Vent
d)
Volcano
10.
If geologists detect many small earthquakes in an area near a volcano, what can they infer about the volcano?
a)
It is dormant
b)
It is probably about to erupt
c)
It is extinct
d)
It is a good source of geothermal energy
11.
The formation of the Hawaiian Islands is one example of
a)
volcanoes forming over a hot spot
b)
volcanoes forming along plate boundaries
c)
the Ring of Fire
d)
continental drift
12.
What type of volcano is created from repeated explosive eruptions?
a)
Composite
b)
Cinder Cone
c)
Shield
13.
What type of volcano is shown above?
a)
Composite
b)
Cinder Cone
c)
Shield
14.
Magma that forces itself vertically through rock layers forms what when cooled?
a)
Sill
b)
Dike
c)
Batholith
d)
Dome Mountain
15.
Magma that hardens in a volcano's pipe create a
a)
Sill
b)
Dike
c)
Volcanic neck
d)
Batholith
16.
What provides the force that causes magma to erupt to the surface?
a)
the silica in the magma
b)
dissolved gases trapped in the magma
c)
gravity in the lithosphere
d)
the density of the magma
17.
True or False: Viscosity increases as temperature increases.
a)
True
b)
False
18.
True or False: A pyroclastic flow occurs during an explosive eruption.
a)
True
b)
False
19.
True or False: Magma sometimes forces its way out a the side of a volcano through a vent.
a)
True
b)
False
20.
What is a hazard from an explosive eruption?
a)
Pyroclastic flow
b)
Ash cloud
c)
Volcanic bombs
d)
All of these options
21.
The major ring of volcanoes that circles the Pacific Ocean is called thep
a)
volcanic belt of Pacific volcanoes
b)
Ring of Fire
c)
Ocean ring
d)
Ring of Pacific Fire
22.
Why are hot springs hot?
a)
The ground water gets heated by nearby magma.
b)
They just are
c)
The water is warmed by solar energy
d)
The ground water comes to the surface and warms up the closer it gets.
23.
If a volcano's magma is high in silica, the volcano will
a)
erupt quietly
b)
remain dormant
c)
produce dark-colored lava
d)
erupt explosively
24.
Magma that is high in silica produces what color lava?
a)
Light colored
b)
Dark colored
25.
What is a geyser?
a)
A pool of warm water.
b)
A fountain of hot water that shoots up in the air.
c)
A type of volcano.
d)
Earth's hot tub.
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