Volcano Facts
The long tube that connects the magma chamber to the Earth's surface is called....
What is the vent.
Low and very wide, these are called _________ volcanoes.
What is shield.
_________ trapped in the magma under pressure provide the force for volcanic eruptions.
What is gases.
The bowl shaped opening at the top of most volcanos is called the ______________
What is a crater.
The main hazard that comes from a quiet volcanic eruption would be...
What is the lava flow.
If a volcano has magma that is high in silica it will probably have an ___________ eruption.
What is explosive.
Alternating layers of lava and ash create ___________ volcanoes.
What is composite.
Pyroclastic flows usually occur during a(n) _________ eruption.
What is explosive.
A large mass of rock that forms from cooled magma inside the crust is called a(n) ______________.
What is batholith.
The steps of of forming a Cinder Cone volcano are
1.
2.
3.
What are......
1. eruption
2. formation of cone and crater
3. lava flow
The smallest particles that are created by a volcanic eruption are known as _________.
What is ash.
Volcanoes made of primary ash, cinders and bombs are known as _______ volcanoes.
What is cinder cone.
During a quiet eruption, lava flows very _________ and will ________ everything in it's path.
What is slowly and burn.
Magma that "squeezes" between the horizontal layers of rock forms a ________.
What is sill.
The largest extinct volcano in the solar system.
What is Olympus Mons?
If geologist detect many small earthquakes in the area near a volcano, they can infer is it...
What is probably about to erupt.
When the tip of the volcano collapses in on itself it creates a space below it filled with magma called a _________.
What is caldera.
The lava that forms from fast moving lava that is thin and and runny and looks like rope like coils when it cools is known as ___________. (A Hawaiian word!)
What is Pahoehoe.
The main vent in a volcano is often called _______.
What is the central vent.
The Hawaiian Islands were formed by this
What is a Hot Spot
A dormant volcano is a volcano that can erupt in the near future? (True or False)
What is false...an active volcano.
Similar to a cinder cone, except it is still filled with all of its cinder and ash _____.
What is a Lava Dome.
In what location would you MOST likely find volcanoes?
What is along plate boundaries where a plate is subducted.
A major volcanic belt known as the __________ circles the Pacific Ocean.
What is Ring of Fire.
Mountains that are formed by volcanoes along a coastline occur at ______________.
What is converging plate boundaries.