WorksheetsVolcano Unit Review
Total questions: 35
Worksheet time: 19mins
Where do MOST volcanoes form?
over a hot spot
near transform boundaries
along divergent and convergent boundaries
where two continental plates collide
What ocean does the Ring of Fire surround?
Atlantic ocean
Pacific Ocean
Caribbean Sea
Arctic Ocean
Which statement below is TRUE?
Island arcs form as a plate moves over a hot spot.
Hot spots form parallel to deep ocean trenches where subduction occurs.
Hot spots and Island arcs are the same thing.
Island arcs form parallel to a deep ocean trench where subduction occurs.
What is this a picture of?
Hot spot
Island arc
Caldera
Subduction zone
______ is an example of a hot spot. _______ is an example of an island arc.
Mt. Vesuvius; Mt. Fuji
Hawaii; New Zealand
Japan; Caribbean Islands
Yellowstone; Hawaii
What is the difference between magma and lava?
Magma is inside the earth; lava is in the magma chamber
Lava is inside the earth; Magma has erupted onto the surface.
Lava is what makes pyroclastic flows; magma makes ash clouds
Magma is inside the earth; lava has erupted onto the surface.
How were the Hawaiian Islands created?
The Hawaiian islands were part of Russia but broke off long ago.
The Pacific Plate subducted under the North American plate creating a string of volcanic islands at the same time.
The Pacific Plate moved over a hot spot that created a string of islands, one at a time.
The Hawaiian islands were created when mounds of garbage collected in the middle of the Pacific Ocean.
What is #1?
Pipe
Magma Chamber
Ash Cloud
Vent / Crater
What is #13 & #14?
Pipe
Magma Chamber
Ash Cloud / lava flow
Vent / Crater
What is #7 & #9?
lava & ash layers
Magma Chamber
Ash Cloud / lava flow
Vent / Crater
What is #3?
lava & ash layers
Magma Chamber
Pipe
Vent / Crater
What kind of volcano has a typical cone shape and can erupt quietly OR explosively?
Shield Volcano
Cinder Cone Volcano
Composite Volcano (Stratovolcano)
Lava Plateau
What kind of volcano is the largest and is responsible for building the Hawaiian islands?
Shield Volcano
Cinder Cone Volcano
Composite Volcano (Stratovolcano)
Lava Plateau
What kind of volcano is the smallest and made entirely out of cinders and ash?
Shield Volcano
Cinder Cone Volcano
Composite Volcano (Stratovolcano)
Lava Plateau
What kind of volcano produces Pahoehoe and A'a lava flows?
Shield Volcano
Cinder Cone Volcano
Composite Volcano (Stratovolcano)
Lava Plateau
What kind of volcano produces lahars and pyroclastic flows?
Shield Volcano
Cinder Cone Volcano
Composite Volcano (Stratovolcano)
Lava Plateau
What kind of volcano erupts lava from long cracks in the ground called fissures?
Shield Volcano
Cinder Cone Volcano
Composite Volcano (Stratovolcano)
Lava Plateau
What is this a picture of?
Caldera
Dike & Sill
Batholith
Volcanic neck
What is this a picture of?
Caldera
Dike & Sill
Batholith
Volcanic neck
What is this a picture of?
Caldera
Dike & Sill
Batholith
Volcanic neck
What is this a picture of?
Caldera
Dike & Sill
Batholith
Volcanic neck
What IS geothermal energy?
It is an extremely hot area beneath the crust that melts a whole in the crust above.
It is energy from the wind; wind spins turbines generating electricity
It is heat from the earth; magma heats ground water
It is a fountain of lava that can shoot 100 feet into the air.
What are two ways humans can USE geothermal energy?
to heat their home
to slow down global warming
to generate electricity
to prevent a volcanic eruption
Step 1 of a volcanic eruption: Magma rises and the pressure around it _______.
increases
decreases
Step 2 of a volcanic eruption: As pressure acting on the magma decreases, gases inside the magma can form ______.
ash
lava
bubbles
silica
Step 3 of a volcanic eruption: The internal pressure from the gasses forming bubbles _______ until the volcano erupts.
Increases
Decreases
stays the same
Check all that are TRUE about quiet eruptions:
Low amounts of silica.
High amounts of dissolved gases.
Magma has LOW viscosity.
Large ash clouds and pyroclastic flows.
Check all that are TRUE about explosive eruptions:
Low amounts of silica.
High amounts of dissolved gases.
Magma has HIGH viscosity.
Large ash clouds and pyroclastic flows.
TRUE or FALSE: Pahoehoe lava is smooth and flows very slowly. A turtle could walk faster!
TRUE
FAST
TRUE or FALSE: A'a lava flows are rough and jagged. They are also very fast - they move faster than a person can run.
TRUE
FALSE
What are three different kinds of tephra?
ash
volcanic bombs
pahoehoe
cinders (lapilli)
How can ash from an explosive eruption be hazardous?
Ash can cover fields destroying crops creating a food shortage.
It is dangerous to inhale and can choke plane engines.
It can be slippery and reduce visibility making it hard to drive.
All of the above
A volcanic mudflow created with magma heats groundwater & snow at the top of a volcano is called a ______.
pyroclastic flow
ash cloud
lahar
tsunami
A cloud of hot gases, ash, and other tephra that races down the side of a volcano at incredible speeds is called a __________.
pyroclastic flow
ash cloud
lava flow
lahar
A volcano that is not currently active, but could become active again in the future is ______.
active
dormant
extinct
geothermal
