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Vocab
Types of Volcanoes
Lava & Magma
Vocab #2
Mixed Bag!
100
Particles produced in volcanic eruptions.
What is pyroclastic material?
100
The most dangerous type of volcano.
What is a composite cone volcano?
100
True or False: Magma forms when solid rock in the inner and outer core partially melts.
What is false?
100
A semi-molten particle larger than 64mm, ejected as glowing lava.
What is a volcanic bomb?
100
A change in temperature with depth.
What is geothermal gradient?
200
A large depression in a volcano.
What is a caldera?
200
The dome-type of volcanoes often found in Hawaii.
What is a shield volcano?
200
When the temperature of lava increases, the viscosity ___________ (increases or decreases).
What is decreases?
200
Often a small part of a batholith that is not yet fully exposed.
What is a stock?
200
A large intrusive igneous body greater than 100km2 accumulates and becomes exposed.
What is a batholith?
300
An intrusive feature formed when magma is injected into fractures cutting across preexisting rock layers.
What is a dike?
300
The steep-walled depression found at the summit of most volcanoes.
What is a crater?
300
When basaltic lava hardens, it forms aa, which is _______________ (smooth or rough) surfaces.
What is rough?
300
At divergent plate boundaries in the ocean, magma rises and melts because of a decrease in _______.
What is pressure?
300
Magma injected along sedimentary bedding surfaces close to Earth's surface.
What is a sill?
400
A structure formed from the cooling and hardening of magma beneath Earth's surface.
What is a pluton?
400
Most shield volcanoes have grown from the ocean floor to form THESE.
What are islands?
400
Most magma is produced along these types of boundaries. (divergent or convergent?)
What is divergent?
400
The landform that is created at divergent ocean plate boundaries.
What are oceanic ridges?
400
A substance's resistance to flow.
What is viscosity?
500
Formed when fluid basaltic lava flows out of fissures.
What is a lava plateau?
500
The three types of volcanoes.
What are cinder cones, shield, and composite cones?
500
Most hot spots have lasted ______________ years.
What is millions?
500
When magma is injected between sedimentary layers close to Earth's surface and collects as a lens-shaped mass.
What is a laccolith?
500
When magma from a large magma chamber invades fractures in the surrounding rocks.
What is a dike?