Download True or False

True or False
The volcano shown with its long, gentle
slopes would best be described as a
shield volcano.
X
ANSWER?
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True or False
Magma erupts through an opening in
Earth’s crust called a vent.
X
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True or False
Volcanoes associated with convergent plate
boundaries form the Circum-Pacific and
the Mediterranean Belts.
X
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True or False
Composite volcanoes are made of basaltic
lava.
X
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True or False
Cinder-cone volcanoes have steep sides
and are generally the smallest volcanoes.
X
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True or False
Temperature and pressure decrease with
depth beneath Earth’s surface.
X
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True or False
A pluton is an intrusive metamorphic rock
body formed from magma.
X
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True or False
The hotter the magma or lava, the greater is
its viscosity.
X
ANSWER?
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True or False
Lava that has low viscosity moves slower
than lava with high viscosity
X
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True or False
All volcanoes form at plate boundaries.
X
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Internal resistance to flow is
a. Silica
b. Tephra
c. pyroclastic
d. viscosity
X
ANSWER?
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Depression that forms when the
top or side of a volcano
collapses into the magma
chamber is a
a. Caldera
b. Pluton
c. Tephra
d. Pyroclastic material
X
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Opening in Earth’s crust
through which lava erupts
a.Caldera
b.Crater
c. Pluton
d.Vent
X
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Types of plutons include ____.
a. shields, cinder-cones, c. dust, ash, lapilli, volcanic
and composites
blocks, and volcanic
bombs
b. vents, craters, and
calderas
d. batholiths, stocks, sills,
dikes, and laccoliths
X
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Using the diagram to the right,
which letter represents the
crater associated with the
volcano?
a.A
b.B
c. C
d.D
X
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Using the diagram to the right,
which letter represents the
magma chamber associated
with the volcano?
a.A
b.B
c. C
d.D
X
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Bowl-shaped depression around
a vent at the top of a volcano is
a
a.Caldera
b.Crater
c. Pluton
d.Vent
X
ANSWER?
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According to the diagram, which
Hawaiian Island is the oldest?
a.Loihi
b.Hawaii
c. Kauai
d.Molokai
X
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Broad, gently sloping sides
a.shield volcano
b.cinder-cone volcano
c. composite volcano
X
ANSWER?
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Made of layers of tephra and
lava
a.shield volcano
b.cinder-cone volcano
c. composite volcano
X
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Steep-sided
a.shield volcano
b.cinder-cone volcano
c. composite volcano
X
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Largest of the volcanoes
a.shield volcano
b.cinder-cone volcano
c. composite volcano
X
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Forms from layers of basaltic
lava
a.shield volcano
b.cinder-cone volcano
c. composite volcano
X
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Forms as tephra ejected high
into the air fall back to Earth
and pile around the vent
a.shield volcano
b.cinder-cone volcano
c. composite volcano
X
ANSWER?
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Forms in the upper mantle
a.basaltic magma
b.andesitic magma
c. rhyolitic magma
X
ANSWER?
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Magma with the lowest viscosity
a.basaltic magma
b.andesitic magma
c. rhyolitic magma
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Most explosive form of magma
a.basaltic magma
b.andesitic magma
c. rhyolitic magma
X
ANSWER?
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Magma Characteristics
Type of
Magma
Source
Material
Viscosity
Gas
Content
1.
2.
3.
1–2%
Andesitic
magma
4.
5.
3–4%
Rhyolitic
magma
Continental
crust
6.
4-6%
Which type of magma is in
#1?
ANSWER?
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Magma Characteristics
Type of
Magma
Source
Material
Viscosity
Gas
Content
Basaltic
magma
Upper
mantle
3.
1–2%
Andesitic
magma
Oceanic
Crust
5.
3–4%
Rhyolitic
magma
Continental
crust
6.
4-6%
What is the viscosity of basaltic magma,
low, medium or high?
ANSWER?
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Magma Characteristics
Type of
Magma
Source
Material
Viscosity
Gas
Content
Baslatic
magma
Upper
mantle
Low
1–2%
Andesitic
magma
Oceanic
Crust
5.
3–4%
Rhyolitic
magma
Continental
crust
6.
4-6%
What is the viscosity of andesitic
magma, low, medium or high?
ANSWER?
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Magma Characteristics
Type of
Magma
Source
Material
Viscosity
Gas
Content
Basaltic
magma
Upper
mantle
Low
1–2%
Andesitic
magma
Oceanic
Crust
Medium
3–4%
Rhyolitic
magma
Continental
crust
6.
4-6%
What is the viscosity of rhyolitic
magma, low, medium or high?
ANSWER?
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How is convergent volcanism
different from divergent
volcanism?
X
ANSWER?
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Contrast the three major types
of volcanoes.
X
ANSWER?
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Final Jeopardy
• Why does lava containing large amounts
of dissolved gases generally produce a
more violent explosion than lava that
contains small amounts of dissolved
gases?