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Volcanoes
Test Description: Volcanic eruptions and landforms
Instructions: Answer all questions to get your test result.
1) The volcanic landform that is formed when the more resistant volcanic pipe remains after most of the cone has been eroded is called a ____.
A
lahar
B
caldera
C
volcanic neck
D
volcanic vent
2) As the temperature of lava increases, ____.
A
it can flow a much shorter distance
B
its viscosity decreases
C
its viscosity increases
D
it begins to harden
3) Which of the following is true about cinder cones?
A
They usually only erupt once.
B
all of these
C
They are usually less than 300 meters high (small for a volcano).
D
They often occur in groups.
4) Highly explosive volcanoes tend to have what type of magma?
A
magma with low viscosity, and lower gas content
B
magma with high viscosity, and higher gas content
C
magma with high viscosity, and no gas content
D
magma with high viscosity, and lower gas content
5) Pyroclastic flow:
A
is made of gas and dust at 500 degrees Celcius
B
moves 150 miles per hour
C
is very deadly
D
all of these
6) The most violent volcanic eruptions are associated with what type of volcano?
A
composite cones
B
cinder cones
C
shield volcanoes
D
fissure eruptions
7) The broad, slightly dome-shaped volcanoes of Hawaii are ____.
A
pyroclastic volcanoes
B
shield volcanoes
C
cinder cones
D
composite cone
8) The Hawaiian Islands were formed when the Pacific Plate moved over ____.
A
the Aleutian Plate
B
an ocean ridge
C
a subduction zone
D
a hot spot
9) Crater Lake in Oregon was produced when ____.
A
the summit of a volcano collapsed
B
a lava dam blocked a river
C
a large explosion blew out the side of a large volcano
D
a lava flow erupted from a volcano
10) What type of lava flows?
A
pyroclastic flow
B
ash flow
C
aa flow
D
pahoehoe flow
*select an answer for all questions
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