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Earth Science Chapter 6 Test Review Flashcards | StudBud
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Earth Science Chapter 6 Test Review
Earth Science Chapter 6 Test Review
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Volcanoes
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Answers
1
What are the 3 main types of volcanoes?
sheild, pahoehoe, and vented
cinder, cone, and composite
cinder cone, lapilli, and caldera
shield, composite, and cinder cone
2
Viscosity refers to lava's
temperature
flow
appearance
weight
3
a funnel-shaped pit
shield volcano
caldera
cinder cone volcano
crater
4
What pyroclastic material reaches the atmosphere and circles Earth for years?
lapilli
volcanic ash
volcanic bombs
pahoehoe
5
How is pyroclastic material formed?
when magma explodes into the air and hardens
when magma remains underground too long
when lava flows calmly from a crack in Earth's crust
when lava flows underwater
6
Runny lava probably...
is hotter than most lava
has a low silica content
comes from explosive volcanoes
has been cooled below the surface
7
created by a combination of explosive and nonexplosive eruptions
composite volcano
crater
shield volcano
cinder cone volcano
8
During a nonexplosive eruption, you'd expect to see...
giant fountains of laval and rock
clouds of ash darkening the sky
huge lava flows
mountainsides caving in
9
Which type of lava flows like dripping wax?
blocky
aa
pahoehoe
pillow
10
If there is a lot of water in magma,
an explosive eruption is more likely
a nonexplosive eruption is most likely
then the temperature at its center is low
no eruption will occur
11
A vent or fissure in the Earth's surface through which magma and gases are expelled is called...
earthquake
vapor chamber
volcano
magma chamber
12
an area where volcanoes form far away from tectonic plate boundaries is called a...
caldera
volcano zone
hot spot
mid-ocean ridge
13
A ____ volcano is most likely to erupt in the near future.
active
viscous
dormant
extinct
14
Which type of lava is cool, stiff and forms heaps of sharp chunks near the vent?
blocky
aa
lapilli
pahoehoe
15
a small volcano; usually erupts only for a short time
crater
cinder cone volcano
shield volcano
composite volcano
16
Volcanoes mostly form at
mountain ranges
bodies of water
plate boundaries
the center of continents
17
What causes rock to melt?
pressure and temperature decrease
temperature increases and pressure decreases
temperature decreases and pressure increases
pressure and temperature increase
18
a large, flat area covered by lava
cinder cone
crater
lava plateau
caldera
19
What pyroclastic material's name means "little stones"?
blocky
volcanic bombs
lapilli
pahoehoe
20
What does a tiltmeter measure?
the temperature inside a volcano
gas ratios in a volcano
changes in a volcano's slope
the intensity of earthquakes
21
Why do oceanic plates subduct when they collide with continental plates?
oceanic crust is denser and thick than continental crust
continental crust is denser and thinner than oceanic crust
continental plates move more quickly than oceanic plates
oceanic crust is denser and thinner than continental crust
22
How can volcanic eruptions change the climate?
temperature rise beause of the heat coming from lava
volcanic eruptions do not affect climate
scorched land creates drought conditions
ash blocks sunlight causing temps to drop
23
Magma gathers in...
magma chambers
landslides
vents
calderas
24
A caldera is...
a chamber that holds molten lava beneath Earth's surface
a depression created when a magma chamber collapses
a large crack in the Earth's crust that allows lava to escape
a large lake on top of a mountain
