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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All
of the following affect the temperature at which magma forms EXCEPT ____. a. | pressure | c. | water | b. | composition of source material | d. | viscosity | | | | |
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2.
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Which
of the following are used to classify plutons? a. | uplift, erosion, weathering, and
deposition | b. | amount of silica and dissolved gases | c. | size, shape, and
relationship to surrounding rocks | d. | viscosity, amount of silica, and dissolved
gases | | |
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3.
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Most
volcanoes occur ____. a. | along convergent boundaries | c. | along divergent boundaries | b. | far from
tectonic plate boundaries | d. | randomly | | | | |
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4.
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Types
of plutons include ____. a. | shields, cinder-cones, and composites | b. | vents, craters,
and calderas | c. | dust, ash, lapilli, volcanic blocks, and volcanic
bombs | d. | batholiths, stocks, sills, dikes, and
laccoliths | | |
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5.
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Which
of the following are landscape features associated with volcanoes? a. | uplift, erosion,
weathering, and deposition | b. | hot spots and flood basalts | c. | vents, craters,
and calderas | d. | batholiths, stocks, sills, dikes, and
laccoliths | | |
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6.
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Volcanism that occurs under water along mid-ocean ridges is ____. a. | the
Mediterranean Belt | c. | a hot
spot | b. | the Ring of
Fire | d. | rift
volcanism | | | | |
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Completion
Complete each sentence or
statement.
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Complete the
table below.
Magma
Characteristics | Type of
Magma | Source Material | Viscosity | Gas
Content | Basaltic
magma | 1. | 2. | 1–2% | Andesitic
magma | 3. | 4. | 3–4% | 5. | Continental crust | 6. | 4-6% | | | | |
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7.
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Number 1 in
table above is ____________________.
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8.
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Number 2 in
the table above is ____________________.
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9.
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Number 3 in
the table above is ____________________.
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10.
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Number 4 in
the table above is ____________________.
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11.
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Number 5 in
the table above is ____________________.
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12.
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Number 6 in
the table above is ____________________.
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Matching
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Match each letter that appears on the diagram with the correct feature below.
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13.
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Laccolith
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14.
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Dike
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15.
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Lava
flow
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16.
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Sill
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17.
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Volcano
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Match
each item with the correct definition below. a. | caldera | d. | pluton | b. | vent | e. | tephra | c. | viscosity | f. | crater | | | | |
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18.
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Volcanic
fragments thrown into air during a volcanic eruption
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19.
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Internal
resistance to flow
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20.
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Opening in
Earth’s crust through which lava erupts
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21.
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Bowl-shaped
depression around a vent at the top of a volcano
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22.
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Depression
that forms when the top or side of a volcano collapses into the magma chamber
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Short Answer
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23.
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In
the map below, what does the bend in the Hawaiian-Emperor volcanic chain at Daikakuji Seamount
indicate?
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Compare and contrast each pair of related terms or phrases.
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24.
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sill,
dike
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25.
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Describe the
composition and characteristics of andesitic magma.
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26.
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The volcano
Izalco in El Salvador is a small, steep-sided volcano. What conclusions can be drawn about the
characteristics of the lava that formed this volcano?
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A
substance’s viscosity is a measure of its internal resistance to flow. Viscosity is a property
of lava. When lava is heated or cooled, its viscosity changes. Think about what type of demonstration
could be designed to show the effect of temperature on the viscosity of lava. Then answer the
following questions.
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27.
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Propose a
hypothesis that describes the relationship between temperature and viscosity.
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28.
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What
substances could be used to demonstrate the effects of temperature on the viscosity of
lava?
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29.
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How would
you manipulate the temperature of the substance?
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30.
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What factors
must remain the same?
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