Volcano Facts
Volcano Types
Volcano Lava
Don't Blow Your Top!
More Volcano Facts
100
The area around the Pacific Ocean that is full of volcanoes, because of the plate boundaries.
What is the "Ring of Fire"?
100
Thin, runny lava produces _________ volcanoes.
What is shield.
100
This type of lava pours out quickly and forms a sharp, brittle crust.
What is Aa lava?
100
If a volcano has magma that is high in silica it will probably have a(n) ___________ eruption.
What is an explosive eruption?
100
The large depression left behind when the magma chamber below a volcano collapses is called ___________.
What is a caldera?
200
The volcanoes of Hawaii and other places far from tectonic plate boundaries are caused by ______________.
What are hot spots?
200
Alternating layers of lava and ash create ___________ volcanoes.
What is composite or strato-volcanoes.
200
Pyroclastic flows usually occur during a(n) _________ eruption.
What is explosive.
200
Lava with a high viscosity is ________________.
What is thick, like pudding or honey or molasses? (or some other suitable answer accepted by Mrs. Bennett)
200
The bowl shaped area around a volcano's central vent is a....
What is a crater.
300
The smallest particles that are created by a volcanic eruption are known as _________.
What is ash.
300
Volcanoes with steep sides made of primary ash, cinders and bombs are known as _______ volcanoes.
What is cinder cone.
300
This lava forms rounded lumps, underwater.
What is Pillow lava?
300
This climate condition could occur due to a huge volcanic eruption.
Ash blocks sunlight, causing temperatures to drop?
300
This instrument can detect changes in the angle of a volcano's slope that may signal an eruption.
What is a tiltmeter or GPS?
400
Underground water heated by magma that sprays out of the Earth creates a __________.
What is geyser.
400
A type of volcano that is not likely to erupt again is considered to be ____________.
What is dormant.
400
The most common place to find volcanoes would be.....
What is along mid-ocean ridges and where a plate is subducted or along the edges of tectonic plates.
400
This is most likely to happen if the water content of magma is high
What is an explosive eruption?
400
Volcanoes that form along a mid-ocean ridge occur at ________________ plate boundaries.
What are diverging plate boundaries?
500
Rock begins to melt when temperature ____________ and pressure ______________.
What is temperature increases and pressure decreases.
500
This type of volcano has not erupted in recorded history and will not likely erupt again.
What is an extinct volcano?
500
This lava flows slowly and has a glassy surface with wrinkles
What is Pahoehoe lava?
500
The long tube that connects the magma chamber to the Earth's surface is called....
What is the pipe or conduit?
500
The Hawaiian Island were formed by thin runny lava that has a ________ amount of silica.
What is low?
M
e
n
u