Vocabulary
Eruptions
Causes
Effects
Materials
100
A vent or fissure in the Earth's surface through which magma and gases are expelled.
What is a volcano?
100
The place underground where molten rock gathers.
What is a magma chamber?
100
The place volcanoes are most likely to form.
What are plate boundaries?
100
A possible climate change due to the ash blocking out the sunlight.
What is a drop in temperatures?
100
The lava type that flows like dripping wax.
What is pahoehoe lava?
200
The depression created when the roof of a magma chamber collapses.
What is a caldera?
200
The term for how lava flows.
What is viscosity?
200
The volcanoes of Hawaii are caused by these.
What are hot spots?
200
A wide, flat landform that results from repeated nonexplosive eruptions of lava that spread over a large area.
What is a lava plateau?
200
The cool, stiff lava that forms jumbled heaps of sharp chunks near the vent.
What is blocky lava?
300
A volcano created by the combination of explosive and nonexplosive eruptions.
What is a composite volcano?
300
The place where most active volcanoes occur.
What is where tectonic plates collide?
300
The area of plate boundaries surrounding the Pacific Ocean that has so many volcanoes.
What is The Ring of Fire?
300
The type of volcano which is built upon layers of lava released from repeating nonexplosive eruptions.
What is a Shield Volcano?
300
The pyroclastic material whose name means "little stones"?
What is lapilli?
400
A funnel-shaped pit.
What is a crater?
400
The composition of this affects how explosive a volcanic eruption is.
What is magma?
400
The movement of one tectonic plate underneath another.
What is subduction?
400
Forms from the lava that flows from undersea rift zones and produces volcanoes and mountain ridges.
What are mid-ocean ridges?
400
This pyroclastic material is known to reach the atmosphere and circle the Earth for years.
What is volcanic ash?
500
An area of deep cracks that forms between two tectonic plates that are pulling away from each other.
What is a rift zone?
500
Magma that is high in this tends to cause explosive eruptions.
What is silica?
500
Name of the type of volcano which is not currently erupting, but which might erupt again one day.
What is dormant?
500
Type of volcano created from pyroclastic material. Do not last very long.
What is a cinder-cone volcano?
500
An instrument that measures the changes in a volcano's slope.
What is a tiltmeter?
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