Name ___________________________ Date _________________ Period ___________
Volcano Notes 6.0
(Fusion 226-237)
Volcano:
Where do volcanoes often form? Volcanoes often form at the edges of _______________ plates.
Volcano Terms
Vent
Hot Spot
Spreading
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
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
Caldera
Fissure
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