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Ch 8 Test
Test Description: Ch 8 Review for test
Instructions: Answer all questions to get your test result.
1) Which of the following best describes magma?
A
solid rock beneath Earth's surface
B
molten rock beneath Earth's surface
C
solid rock at Earth's surface
D
molten rock that flows over Earth's surface
2) Magma can form when
A
magnetic changes occur below Earth's surface
B
a sinking tectonic plate begins to melt
C
rock is exposed to wind, water, and air at Eath's surface
D
molten rock cools on the ocean floor
3) In the middle of tectonic plates, volcanoes may form over
A
oceanic-continental collision zones
B
hot spots
C
continental-continental collision zones
D
cooling centers
4) What happens along a subduction zone?
A
An oceanic plate sinks into the mantle.
B
A continental plate sinks into the mantle.
C
Two oceanic plates pull apart.
D
Two continental plates come together.
5) Which of these might happen along a convergent boundary?
A
Oceanic plates slide horizontally past each other
B
Oceanic plates pull apart.
C
Continental plates pull apart
D
Oceanic and continental plates come together
6) What is a spreading center?
A
a place where plates move horizontally past each other
B
a place where oceanic plates pull apart
C
a place where continental plates come
D
a place where plates move vertically past each other
7) A transform boundary is a place where blocks of rock
A
move horizontally past each other
B
move vertically past each other
C
pull apart
D
come together
8) What is a fault?
A
a boundary between two continents
B
a break in the asthenosphere along which movement takes place
C
a break in the lithosphere along which movement takes place
D
any opening in Earth's crust
9) Most faults and many major geological events occur
A
in the middle of an oceanic plate
B
along tectonic plate boundaries
C
in the middle of a continental plate
D
along the shores of a continent
10) As a block of rock moves along a fault, which of the following may occur?
A
a hot spot
B
a magma subduction
C
a strike-slip
D
an earthquake
11) What causes an earthquake?
A
the slow buildup of stress in a body of rock
B
the sudden release of stress from a body of rock
C
an increase in pressure on a body of rock
D
an increase in the temperature of a body of rock
12) What is one way that a folded mountain belt can form?
A
Two oceanic plates spread apart.
B
Blocks of crust move along faults.
C
Two continental plates push together.
D
Old volcanoes erupt and grow.
13) Volcanoes in folded mountain belts form when
A
an oceanic plate is broken by faults
B
a continental plate moves over a hot spot
C
an oceanic plate partly melts as it goes into the mantle
D
a continental plate crumples as it collides with another plate
14) Blocks of rock tilt when forces pull Earth's crust apart. Where are tilted blocks of rock commonly
A
where two continental plates collide
B
along subduction zones
C
where two oceanic plates collide
D
along ocean spreading zones
15) An opening through which lava, rocks, and gases erupt is called a
A
Fumerole
B
Caldera
C
volcano
D
geyser
16) A dense cloud of super-hot gases and rock fragments that races downhill from an erupting volcano is called a
A
steam explosion
B
landslide
C
pyroclastic flow
D
cinder eruption
17) Most volcanoes occur
A
along fault zones
B
along plate boundaries
C
in the center of a continent
D
over hot spots
18) Which of these can be dangerous to people who live very far from an erupting volcano?
A
ash clouds, because they can be carried by the wind
B
landslides, because they move very fast
C
lava flows, because they can burn the ground
D
volcanic soils, because they are very hot
19) What is a volcano?
A
a chamber of magma deep beneath the surface
B
a huge crater that forms as the result of collapsing rocks
C
a mountain that forms as the result of faulting
D
an opening through which lava, rocks, and gases erupt
20) Which of the following signs might indicate that a volcano might soon erupt?
A
rising temperatures in volcanic lakes
B
decreased wearing away of volcanic rocks
C
falling temperatures in volcanic lakes
D
increased wearing away of volcanic rocks
*select an answer for all questions
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