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