NEW
Font size
WorksheetsVolcanoes Review
Total questions: 40
Worksheet time: 20mins
The type of magma that tends to cause explosive eruptions has a
high silica content and high viscosity
high silica content and low viscosity
low silica content and low viscosity
low silica content and high viscosity
Lava that flows slowly to form a glassy surface (silvery) with rounded wrinkles is called
aa lava
pahoehoe lava
pillow lava
blocky lava
Lava that forms when it erupts underwater is
aa lava
pahoehoe lava
pillow lava
blocky lava
Lava that pours out quickly and forms a brittle crust torn into jagged pieces as molten lava continues to flow underneath is
aa lava
pahoehoe lava
pillow lava
blocky lava
Cool, stiff lava that does not travel far from the erupting vent is
aa lava
pahoehoe lava
pillow lava
blocky lava
Magma forms within the mantle most often as a result of
high temperature and high pressure
high temperature and low pressure
low temperature and high pressure
low temperature and low pressure
What causes an increase in the number and intensity of small earthquakes before an eruption?
the movement of magma
the formation of pyroclastic material
the hardening of magma
the movement of tectonic plates
If volcanic dust and ash remain in the atmosphere for months or years, what do you predict will happen?
Solar reflection will decrease, and temperatures will increase.
Solar reflection will increase, and temperatures will increase.
Solar reflection will decrease, and temperatures will decrease.
Solar reflection will increase, and temperatures will decrease.
At divergent plate boundaries,
heat from Earth's core causes mantle plumes.
oceanic plates sink, which causes magma to form.
tectonic plates move apart.
hot spots cause volcanoes.
A theory that helps explain the causes of both earthquakes and volcanoes is the theory of
pyroclastics
plate tectonics
climactic fluctuation
mantles plumes
Which of the following can happen during nonexplosive eruptions?
Violent explosions can occur.
Tons of rock can be blasted into the air.
Huge amounts of lava can be released.
Fire can shoot into the air
Which of the following would you expect to see during an explosive volcanic eruption?
calm lava flows
hot debris, ash, and gas shooting into the air
a rainbow
lava fountains
The underground body of molten rock that feeds a volcano is a(n)
vent
magma chamber
lava chamber
ash chamber
An opening in the Earth's surface through which volcanic materials passes is a(n)
vent
magma chamber
lava chamber
ash chamber
Large blobs of magma that harden in the air are
volcanic blocks
volcanic bombs
lapilli
volcanic ash
Solid rock erupted from a volcano
volcanic blocks
volcanic bombs
lapilli
volcanic ash
Pebblelike bits of magma that harden before they hit the ground are
volcanic blocks
volcanic bombs
lapilli
volcanic ash
Gases in stiff magma expand rapidly, forming glasslike slivers
volcanic blocks
volcanic bombs
lapilli
volcanic ash
What happens to the atmosphere after large-scale volcanic eruptions?
Volcanic ash and gases disappear from the atmosphere
A small amount of volcanic ash and gases are ejected into the upper atmosphere
Volcanic ash and gases are ejected directly above the volcano
Enormous amounts of volcanic ash and gases are ejected into the upper atmosphere
As volcanic ash and gases spread throughout the atmosphere they can
block enough sunlight to cause global temperatures to drop.
reflect enough sunlight to cause global temperatures to rise.
cause a drop only in local temperatures.
cause a rise only in local temperatures.
A volcano built of layers of lava releases from repeated nonexplosive eruptions
cinder cone volcano
shield volcano
composite volcano
A volcano made of pyroclastic material usually produced from moderately explosive eruptions
cinder cone volcano
shield volcano
composite volcano
A volcano formed from explosive eruptions of pyroclastic material followed by quieter flows of lava; also called stratovolcanoes
cinder cone volcano
shield volcano
composite volcano
A funnel-shaped pit around the top of the volcano's central vent is called a(n)
magma chamber
caldera
crater
lava plateau
When the roof over a magma chamber collapses, it forms a
vent.
caldera.
crater.
lava plateau
Long cracks in Earth's crust through which lava erupts are called
rills
cliffs
rifts
plateaus
A wide, flat landform resulting from repeated nonexplosive eruptions of lava that spread over a large area is called a
crater.
caldera.
lava plateau.
rift.
The rock of Earth's mantle
flows very quickly
has a puttylike consistency
is cooler than Earth's crust
is solid and rock-hard
Rock usually melts to form magma when
temperature decreases or pressure on the rock increases
temperature increases or pressure on the rock decreases
temperature and pressure on the rock both decrease
temperature and pressure on the rock both increase
Tectonic plates move away from each other at a
rift zone
divergent boundary
convergent boundary
magma chamber
An area of deep crack that forms between two tectonics plates that are pulling away from each other is a
divergent boundary
mantle rock
crater column
rift zone
Lava from undersea rift zones produces volcanoes and mountain chains called
the Ring of Fire
subduction zones
hot spots
mid-ocean ridges
A convergent boundary is a place where
tectonic plates move side by side
oceanic crust moves away from continental crust
continental crust is subjected under oceanic crust
tectonic plates collide with each other
Subduction is the movement of one tectonic plate
against another
over another
under another
away from another
As descending oceanic crust scrapes past the continental crust
its temperature and pressure increase
it forms a lava fountain
it forms a volcano
its temperature and pressure decrease
The Hawaiian Islands are located
along a tectonic plate boundary
far from any plate boundary
over a lava fountain
on lava plateaus
A volcano that has not erupted in recorded history is a(n)
active volcano
dormant volcano
extinct volcano
A volcano that has not erupted recently, but may erupt in the future
active volcano
dormant volcano
extinct volcano
A volcano that is erupting now
active volcano
dormant volcano
extinct volcano
A vent or fissure in the Earth's surface through which magma and gases are expelled is called a(n)
earthquake
magma chamber
volcano
vapor chamber
