A volcano that is not currently active is called this
What is dormant
100
the 3 types of volcanoes
What is cinder-cone, shield, composite
100
this forms when an uplift pushes a batholith or smaller body of hardened magma toward the surface.
What is a dome mountain
100
Geologist classify volcanic eruptions as either one of these 2 things
What are explosive or quiet
100
One belt that is formed by many volcanoes that rim the Pacific Ocean
What is the Ring of Fire
200
A volcano that is sometimes erupting smoke, steam,
ash, cinders, and flows of lava
What is Active
200
this type of volcano has gently sloping sides
What is shield
200
these are the largest rock bodies. They form when a large body of magma cools underground without reaching surface.
What are Batholiths
200
how a volcano erupts depends on these factors
What is the amount of silica content in the magma, the magma's viscosity, and how much gas pressure has built up
200
a string of islands created by volcanoes near boundaries where two oceanic plates collide and one sinks beneath the other
What is an Island Arc
300
Magma is slowly forced upward and flows out through a smaller opening generally out to the side of the mountain. This structure is called this
What is a vent
300
this type of volcano is formed by erupted lava that covers a layer of ash & cinder over and over again. They are tall cone-shaped mountains.
What is composite
300
this is formed when Magma squeezes into vertical cracks in rock below the surface and then hardens is called this
Hint: We saw this on our Haleakala hike
What is a dike
300
Magma that has little silica produces these type of eruptions
What is quiet, nonexplosive eruptions with low viscosity lava
300
when plate boundaries pull apart we call these ___________
What are divergent boundaries
400
The steep walled depression (bowl shaped) around the volcano’s pipe is called this
What is crater
400
this type of volcano has lava with high viscosity, producing ash, cinder, and volcanic bombs that erupt explosively and fall to the ground to form a cone-shaped hill
What is cinder cone
400
Magma that is squeezed between horizontal rock layers and hardens is called this
What is a sill
400
this type of flow occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs.
What is a pyroclastic flow
400
Double Jeopardy
This is the molten mixture of rock-forming substances, gasses and water from the mantle.
What is ______________
500
name the 2 of the 3 different ways a volcano can form based on plate tectonic concepts
plates moving toward each other - an ocean plate subducting under a continental plate (convergent boundaries), plates moving away from each other (divergent boundaries) example - a mid ocean ridge, and a plate moving over a hot spot
500
Mount St. Helens or Mount Shasta are examples of this type of volcano. They were created when an oceanic plate was subducted - pushed under the continental plate
What is composite
500
Ship Rock in New Mexico is an example of a solid, igneous core of a volcano left behind. If formed when magma hardened in the volcano's pipe, when the volcano stopped erupting, the softer cone eroded away exposing the harder rock. This is called what?
What is a volcanic neck
500
name and describe the 2 types of lava that might be produced from a quiet eruption
What is pahoehoe (fast flowing, low viscosity, hot, runny lava) and aa (higher viscosity than pahoehoe, cooler, more chunky)
500
Inside a volcano is a system of passage ways through which magma moves. Name all 5 of these...
What is Vent, Pipe, crater, magma chamber, lava flow