This is the magma that flows out onto the Earth's surface.
What is lava?
100
The three kinds of mountains created by the eruptions of volcanoes.
What are Cindercone, Shield, and Composite (Stratocone)?
100
Any activity that includes the movement of magma toward or into Earth's surface.
What is volcanism?
100
At these areas are where most volcanoes occur.
Where is plate boundaries?
100
These are the three classifications for volcanoes based on the activity of the volcano.
What active, dormant and extinct volcanoes?
200
Reservoirs from which volcanic materials erupt.
What are magma chambers?
200
This volcano erupts explosively and forms a cone-shaped hill.
What is Cinder Cone?
200
This is a type of rock that forms when magma cools and hardens. Think back to the rock cycle...it is one of the three main types of rocks.
What is igneous rock?
200
A tectonic setting where volcanoes form: The zone where the rock above a colliding plate melts to form magma, which later erupts as lava.
What is the subduction zone?
200
Fragments of rock that form during a volcanic eruption. Examples include volcanic ash, dust, blocks, bombs, and lapilli.
What are pyroclastic materials?
300
The openings near the peak of a mountain through which volcanic materials erupt.
What are vents?
300
This type of volcano is made up of layers of lava rocks. It's not as steep as cinder cone volcano and is created slowly from quiet eruptions; that's why it has gentle and broad sides.
What is a shield volcano?
300
A region of volcanic activity in the middle of a tectonic plate.
What is a hot spot?
300
A tectonic zone where volcanoes form: a divergent boundary in the ocean.
What are mid-ocean ridges?
300
This type of eruption has a high silica content. It is produced by felsic magma. It is sticky with high viscosity and a high amount of trapped gases. Mt Saint Helens had this type of eruption.
What is an explosive eruption?
400
This is a huge hole left behind when a volcano collapses when the magma chamber empties.
What is a caldera?
400
This type of volcanic landform is made up of layers of lava flows alternating with layers of ash, cinders, and rocks. it is a combination of cinder cone and shield volcanoes.
What is a composite (strato) volcano?
400
A change in earthquake activity, an increase in gas production and a bulging of the cone may signal this.
What is a impending volcanic eruption?
400
This is what happens when the temperature of a rock rises above its melting point.
What is magma will form?
400
This type of lava forms along mid-ocean ridges when magma is cooled quickly. (Think sleep)
What is pillow lava?
500
This is liquid rock produced under the Earth's surface.
What is a magma?
500
This forms when magma cools and hardens below the Earth's crust, before it reaches the Earth's surface.
What is a pluton?
DAILY DOUBLE: Worth another 500 Points:
This Island is cut by a fissure breaking it into two parts. Part of it lies on the North American Plate, the other half on the Eurasian Plate.
500
This is a zone of frequent earthquakes and volcanic eruptions that encircles the Pacific Basin.
What is the Ring of Fire?
500
This is what forms when oceanic lithosphere subducts beneath oceanic lithosphere.
What are island arcs?
500
This type of eruption is produced by magic magma, a runny lava with a low viscosity and few trapped gases.