Name ___________________________ Date _________________ Period ___________
Volcano Notes 5.0
(Fusion 226-237)
Volcano: Any place where _________, ash, or ___________ _______ come out of the
ground.
Where do volcanoes often form? Volcanoes often form at the edges of _______________ plates.
Volcano Terms
Vent
• Actual place where ______________comes through to the surface.
Hot Spot
• ______ can rise to the surface far from plate boundaries at places called ____spots.
• As tectonic plates move over hot spots they form a ________of volcanic mountains.
• Example: Hawaiian Islands
Spreading
• Allows ______ to rise up and create new crust at ______________ plate boundaries.
Question: Using the picture to the right as a guide, explain why volcanoes often form near the edges
of tectonic plates.
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Label the diagram below
A. ______ spot
B. ___________ plate boundary
C. ____________ plate boundary
D. ____________ currents
Name ___________________________ Date _________________ Period ___________
The concentration of volcanoes found encircling the ___________ Ocean is called the
“_____________ of __________”.
Identify: Highlight the
approximate location of the
“Ring of Fire” on the map to
the right.
Question: Why do you suppose it’s
been given the name “Ring of Fire”?
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Types of Volcanoes
Shield
Cinder Cone
Composite
• Has __________,
sloping sides.
• In a shield volcano lava
flows for long distances
making shield
volcanoes _________
and ________.
• They form when
________, cinders, and
bombs of solidified
_________ pile up
around the vent and
form a ________.
• Are mountains built of
___________layers of
______and ash.
• Generally form near
_________ boundaries.
• Produce the most
__________ eruptions.
Question: Scientists find a volcano and begin to dig. They discover alternating layers of cinders (ash,
rock, bombs) and lava. What type of volcano did they discover? __________________________
Name ___________________________ Date _________________ Period ___________
Volcanic Landforms
Crater
• A crater is a large ___________depression in the ground.
• Forms at the top of a volcano.
Caldera
• Sometimes the magma chamber beneath a volcano
________after an eruption then the entire _______collapses.
Fissure
• A fissure is a crack.
• _________and _________come from fissures.
Types of Lava (Not in the book.)
Aa
Pahoehoe
• Generally viscous (thick) liquid
• Flow rate: __________
• Generally less viscous (thin) liquid
• Flow rate: ___________
Levels of Volcano Activity (Not in book.)
Active
Dormant
Extinct
• A _______ volcano that is erupting or shows signs that it
may erupt in the ____________.
• A _____________ volcano. It may __________ _____in the
future and become active.
• A _________ volcano. It is unlikely to erupt again.
Indicate: Scientists find a volcano that hasn’t erupted in the last 50years, but there are indications that
it may erupt again. What level of volcano is this? ___________________
Compare: How is a crater different than a caldera?
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Differentiate: Complete the Venn diagram
about lava types.
Aa
Pahoehoe