Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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What
layers of Earth make up the lithosphere? a. | the crust and lower mantle | b. | the crust and
upper mantle | c. | the continental crust and oceanic
crust | d. | the upper and lower mantle | | |
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2.
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What
layer of Earth is labeled C in Figure 8-2? a. | the crust | c. | the mantle | b. | the
asthenosphere | d. | the
lithosphere | | | | |
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3.
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What
layer of Earth is labeled E in Figure 8-2? a. | the continental crust | c. | the oceanic crust | b. | the
lithosphere | d. | the
mantle | | | | |
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4.
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What
layer of Earth is labeled B in Figure 8-2? a. | the continental crust | c. | the oceanic crust | b. | the
lithosphere | d. | the
mantle | | | | |
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5.
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Earth’s thin, rocky outer layer is its
____. a. | core | c. | outer
core | b. | mantle | d. | crust | | | | |
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6.
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Earth’s core is made of an alloy of ____. a. | iron and nickel | c. | zinc and magnesium | b. | copper and
iron | d. | iron and
zinc | | | | |
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7.
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The
greatest concentration of metals occurs in Earth’s ____. a. | oceanic
crust | c. | core | b. | continental crust | d. | mantle | | | | |
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8.
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What
type of volcano is built almost entirely from ejected lava fragments? a. | cinder
cone | c. | shield
volcano | b. | composite cone | d. | pahoehoe volcano | | | | |
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9.
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The broad, slightly dome-shaped volcanoes of Hawaii are
____. a. | composite cone
volcanoes | c. | pyroclastic
volcanoes | b. | shield volcanoes | d. | cinder cone volcanoes | | | | |
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10.
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A volcano that is fairly symmetrical and has both layers of
lava and pyroclastic deposits is a ____. a. | cinder cone volcano | c. | pyroclastic volcano | b. | shield
volcano | d. | composite cone
volcano | | | | |
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11.
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What
feature is labeled D in Figure 10-1? a. | pipe | c. | crater | b. | volcanic
neck | d. | lava
flow | | | | |
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12.
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What
feature is labeled A in Figure 10-1? a. | pipe | c. | crater | b. | volcanic
neck | d. | vent | | | | |
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13.
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What
type of volcano is illustrated in Figure 10-1? a. | volcanic neck | c. | cinder cone | b. | shield
volcano | d. | composite
cone | | | | |
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14.
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The
most violent volcanic eruptions are associated with what type of volcano? a. | cinder
cones | c. | composite
cones | b. | shield volcanoes | d. | fissure eruptions | | | | |
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15.
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Which
of the following is responsible for the partial melting of rock beneath ocean
ridges? a. | chemical
reactions with atmospheric oxygen | b. | increases in pressure | c. | decreases in
pressure | d. | increases in temperature | | |
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16.
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Magma
tends to rise towards Earth’s surface primarily because ____. a. | water is
abundant in magma | b. | rocks become less dense when they
melt | c. | silica is
abundant in magma | d. | rocks become more dense when they
melt | | |
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17.
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Most shield volcanoes have grown from the ocean floor to form
____. a. | islands | c. | tectonic
plates | b. | dikes | d. | canyons | | | | |
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18.
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Most
of the active volcanoes on Earth are located in a belt known as the ____. a. | circum-Atlantic
belt | c. | Ring of
Lava | b. | Ring of
Fire | d. | East African
Rift Valley | | | | |
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19.
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What
volcanic feature is illustrated at A in Figure 10-2? a. | continental
volcanic arc | c. | hot
spot | b. | volcanic island
arc | d. | ocean
ridge | | | | |
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20.
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What
type of plate boundary resulted in the volcanic activity illustrated in Figure 10-2? a. | divergent plate
boundary | b. | oceanic-oceanic convergent plate
boundary | c. | oceanic-continental convergent plate
boundary | d. | continental-continental convergent plate
boundary | | |
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21.
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A
magma’s viscosity is directly related to its ____. a. | depth | c. | color | b. | age | d. | silica content | | | | |
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22.
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Which
of the following factors helps determine whether a volcanic eruption will be violent or relatively
quiet? a. | amount of
dissolved gases in the magma | b. | temperature of the magma | c. | composition of
the magma | d. | all of the above | | |
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23.
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The particles produced in volcanic eruptions are called
____. a. | laccoliths | c. | pyroclastic material | b. | calderas | d. | volcanic stocks | | | | |
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24.
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Which of the following plays a major part in determining the
form of a volcano? a. | elevation above
sea level | c. | magma
composition | b. | local soil type | d. | nearness of
other volcanoes | | | | |
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25.
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Which
of the following is true about cinder cones? a. | They have very steep sides. | b. | They are usually
less than 300 meters high. | c. | They often occur in groups. | d. | all of the
above | | |
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