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Plate Tectonics
Eruptions
Vocabulary
100
Volcanoes occur most frequently between what?
2 plates - plate boundaries
100
An eruption that flows slowly out of a volcano with no major explosions is known as a
Quiet eruption
100
Define viscosity
A liquid's resistance to flow
200
The circle of active volcanoes around the Pacific Ocean is called the
Ring of Fire
200
Magma with low viscosity will flow ________
Fast/easily
200
To observe a chemical property you must do what
Change the substance being observed
300
When there is more of this inside of lava it will be thicker (more viscosity)
Silica
300
This type of eruption produces large/tall volcanoes
Explosive eruptions
300
What type of energy is produced when water is heated underground?
Geothermal
400
Volcanoes that do not form at plate boundaries are known as what kind of volcano (think hawaii)
Hot Spot volcanoes
400
A volcano that has not erupted in a long time and will probably not erupt again is known as an
Extinct Volcano
400
What is the difference between magma and lava?
Lava = Above ground Magma = Below ground
500
The largest mountain on Earth is where?
The big island of Hawaii
500
What two things affect the viscosity of lava. Describe their affect
Temperature - higher temp = lower viscosity Silica Content - higher silica content = higher viscosity
500
Where in a volcano is magma stored before an eruption?
Magma chamber