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Volcanoes (Miscellaneous)
Volcanic Eruptions
Effects of Volcanic Eruptions
Causes of Volcanic Eruptions
Vocabulary
100
magma that flows on the Earth's surface
What is lava?
100
two examples of how a volcano can affect the climate
What is temperature drop, food shortages, disease, etc.?
100
a large, flat area covered by lava
What is a lava plateau?
100
the category of volcano that is not likely to erupt in the near future but may possibly erupt one day
What is a dormant volcano?
100
a vent or fissure in the Earth's surface through which magma and gases are expelled is called a(n)
What is a volcano?
200
where volcanoes are most likely to form
What is along plate boundaries?
200
a particularly dangerous type of volcanic flow that can race downhill at speeds of more than 200km/h
What is a pyroclastic flow?
200
volcano created by a combination of explosive and nonexplosive eruptions
What is a composite (stratovolcano) volcano?
200
most active volcanoes form where tectonic plates ________
What is collide?
200
columns of rising magma
What are magma plumes?
300
the most common type of volcanic eruption
What is a nonexplosive eruption?
300
the "viscosity" of lava means
What is how lava flows?
300
the depression created when the roof of a magma chamber collapses
What is a caldera?
300
the three categories volcanoes are given to determine whether or not they will erupt
What are active, dormant, and extinct?
300
a funnel-shaped pit around the central vent of a volcano
What is a crater?
400
volcanically active places on Earth far from plate boundaries
What are hot spots?
400
If the water content of magma is high, this is more likely to occur...
What is an explosive eruption?
400
built of layers of lava from repeated nonexplosive eruptions
What is a shield volcano?
400
this instrument measures changes in a volcano's slope
What is a tiltmeter?
400
a small volcano; usually erupts only for a short time
What is a cinder cone volcano?
500
this affects how explosive a volcanic eruption can be
What is the magma composition?
500
Identify the two types of eruptions and what type of material comes from each.
What are explosive eruptions - pyroclastic flow and nonexplosive eruptions - lava flow?
500
three types of volcanoes
What are shield, cinder cone, and composite (stratovolcano)?
500
rock begins to melt when temperature ___________ and pressure ___________
What is temperature "increases" and pressure "decreases"?
500
an area of deep cracks that forms between two tectonic plates pulling away from each other
What is a rift zone?