Show:
Volcanoes and Plate Tectonics
Volcanic Eruptions
Volcanic Landforms
Vocabulary
Random Stuff
100
The location in which volcanoes are mostly found
What are plate boundaries?
100
The main factor that accounts for the difference between quiet and explosive volcanic eruptions.
What is the silica content of the magma?
100
The huge hole left by the collapse of a volcanic mountain.
What is a caldera?
100
A wide, sloping mountain formed by runny lava and quiet explosions.
What is a shield volcano?
100
At what point does magma become lava?
At the Earth's surface.
200
Molten material before it reaches Earth's surface
What is magma?
200
The main hazard from a quiet volcanic eruption.
What are lava flows?
200
Tall, cone-shaped mountains in which layers of lava alternate with layers of ash.
What are composite volcanoes?
200
A volcano that is not erupting but shows signs of eruption in the distant future.
What is a dormant volcano?
200
This kind of eruption is likely to occur in a volcano that is low in silica.
What is a quiet eruption?
300
A belt of volcanoes along the plate boundary that runs along part of the west coast of the United States
What is the Ring of Fire?
300
The bowl-shaped area around a volcano's central vent.
What is a crater?
300
When magma hardens in a volcano's pipe, the result will eventually be a this landform.
What is a volcanic neck?
300
Molten rock and gas leave the volcano through this.
What is a vent?
300
Thin threads of volcanic lava glass.
What is Pele's hair?
400
These often occur along the boundaries of two oceanic plates
What are island arcs?
400
DAILY DOUBLE!!!!! This provides to the force that causes magma to erupt to the surface.
What are the dissolved gases in the magma?
400
Formed when many layers of thin, runny lava build up a high, level area.
What is a lava plateau?
400
A mass of rock that forms when a large body of magma cools inside of the crust.
What is a batholith?
400
This type of lava rock forms from fast moving, thin, runny lava.
What is Pahoehoe?
500
True or False: Pyroclastic flow typically occurs during an explosive erruption.
True!!!
500
Sometimes rising magma is blocked by horizontal layers of rock. The magma forces the layers of rock to bend upward into this landform.
What is a dome mountain?
500
DAILY DOUBLE!!!!!! This forms when magma forces itself between rock layers and hardens.
What is a sill?
500
This type of lava rock forms from thicker, cooler lava.
What is Aa?