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Volcanoes and Plate tectonics
Properties of Magma
Volcanic Eruptions
Volcanic landforms
Vocabulary
100
When magma erupts and reaches the surface.
How do hot spot volcanoes form?
100
Compound made of particles of the elements Oxygen, and silicon.
What is silica?
100
A vent and a side vent.
What are the two major release points in a volcano?
100
Shield volcanoes, cindercone volcanoes, composite volcanoes, lava plateaus, and calderas.
What are the landforms that form from lava and ash?
100
A bowl shaped area that forms around the top of a volcano near the central vent.
What is a crater?
200
Along the boundries of Earth's plates.
Where do volcanic belts form?
200
A fast moving lava with a low viscosity.
What is Pahoehoe?
200
Area covered by lava as it pours out of a vent.
What is lava flow?
200
A mass of rock formed when a large body of magma cooles inside the crust.
What is a batholith?
200
A weak spot in the crust when molten material or magma comes to the surface.
What is a volcano?
300
Is a major volcanic belt formed by the many volcanoes that rim the Pacific Ocean.
What is the Ring of Fire?
300
The resistance of a liquid to flow.
What is Viscosity?
300
Quiet and explosive eruptions.
What are the two kinds of volcanic eruptions?
300
Volcanoc necks, dikes and sills, batholiths, and dome mountains.
What are the landforms that can be formed from magma?
300
A dead or a volcano that is unlikely to erupt again.
What is an extinct volcano?
400
An area where materials from deep within the mantle rise and then melt forming magma.
What is a hot spot?
400
Lava that is cooler and slower moving.
What is aa?
400
A pocket filled with magma.
What is a magma chamber?
400
Magma that forces itself across rock layers and hardens.
What is a dike?
400
When an explosive eruption hurls out a mixture of hot gases, ash, cinders and bombs.
When does a pyroclastic flow occur?
500
Resulting volcanoes create a string of islands.
What is an Island arch?
500
Silica content and temperature.
What does the viscosity of magma depend on?
500
They are fire, gas, pyroclastic flow, wet ash, landslides and avalanches, melted snow and rock.
What are the types of hazards that result from a volcanic eruption?
500
Hot springs and geysers.
What are the types of geothermal activity?
500
A tall cone shaped mountain in which layers of lava alternate with layers of ash.
What is a composite volcano?