Volcanoes
What is a volcano?
___________________________________________________________________
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Divergent Plate Boundaries:
Most divergent plate boundaries are at the bottom of the oceans, causing most of the
volcanic activity to be ______________, thus forming _________________.
Convergent Plate Boundaries
•
When two plates (usually an oceanic and continental plate) collide, causing the one
plate to submerge under the other plate (called subducting). In the case of oceaniccontinental, a deep trench just off shore is formed.
•
When the viscous magma, reaches the surface, a volcano is formed.
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*This is what caused the __________________________ volcanoes.*
Hots Spots
Located over a mantle plume, where the convection of the Earth’s mantle creates a column
of hot material that rises until it reaches the crust. Pipes form in the crust, which vents
________.
Ring of Fire

Result of plate tectonics and the movement and hitting of crustal plates.

Area where large numbers of earthquakes and volcanic eruptions occur in a
_______________km horseshoe shape. Contains _____ volcanoes, with over
____% of worlds active and dormant volcanoes.
What are the 3 types of Volcanoes?
1.______________________________
2.______________________________
3.______________________________
Write the definition and match the picture.
Shield Volcano:
______________________________
______________________________
Cinder Cone Volcano:
______________________________
______________________________
______________________________
Composite Volcano:
______________________________
______________________________
______________________________
What is the name of this volcano? What kind of volcano is this?
____________________ ____________________ _____________________
____________________ ____________________ _____________________
Diamond Head
Early sailors mistakenly thought glistening calcite crystals inside the tuff rocks were
________________, leading to the incorrect name. Diamond Head formed when
___________________________________________________________________
__________________, causing large explosions that threw exploded magma particles
(tuff) into a _____________________.
Mt Shasta
Over the last ___________ years, Mt. Shasta has erupted on average once every _____
years. During the ________ years the volcano has erupted about once every ________
years. The most recent eruption may have occurred in 1786 A.D.
Mt. Kohala
Kohala is the oldest of the subaerial volcanoes that make up the Island Of Hawaii. Kohala
is considered to be extinct _______________________________________________
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