This is a weak spot in the crust where magma comes to the Earth's surface.
What is a volcano.
100
This is the layer of the Earth in which lava begins as magma.
What is the aesthenosphere?
100
Volcanic eruptions create landforms made of the following materials.
What are lava, ash, and other materials.
100
Name four landforms created from lava and ash.
What are (any four of the following) shield volcanoes, cinder cone volcanoes, composite volcanoes, lava plateaus, calderas, soils from lava and ash.
100
an opening in the earth's surface where hot gasses and liquids from earth's interior are released
What is a vent?
200
These are the two types of boundaries where most volcanoes form.
What are convergent and divergent boundaries.
200
These are the two ways in which geologists classify the volcanic eruptions.
What are quiet and explosive.
200
Volcanic eruptions create the following four types of landforms.
What are shield volcanoes, cinder cone volcanoes, composite volcanoes, and lava plateaus.
200
This is a high, level area formed by repeated lava flows.
What is a lava plateau?
200
the area of volcanic activity that develops above rising plumes of magma
What is a hot spot?
300
This chain of volcanoes form where two oceanic plates collide.
What is a volcanic island arc.
300
This type of volcanic eruption occurs when an explosive eruption hurls out ash, cinders, and volcanic bombs.
What is a pyroclastic flow.
300
This type of volcano is created when thin layers of lava pour out of a vent, and more layers of this lava harden on top of previous layers. Then the layers gradually build a wide, gently sloping mountain.
What is a shield volcano.
300
These are three types of hazards caused by volcanic eruptions.
What are (any three) lava flows sets fire, bury objects, kills people, kills animals, kills plants, buries towns, damages crops, clogs car and airplane engines.
300
This forms when the top of a volcanic mountain collapses. It often fills with water creating a lake.
What is a caldera?
400
This is the process where oceanic crust slides beneath continental crust and forms volcanoes on land
What is subduction?
400
Geologists use the following three terms to describe a volcano's stage of activity.
What are active, dormant, and extinct.
400
This type of mountain is formed by lava flows alternating with explosive eruptions.
What is a composite volcano.
400
Sometimes magma rises upward through cracks in the crust, but does not reach the surface. The magma cools and hardens into rock beneath the surface creating which types of features.
What are volcanic necks, dikes, sills, batholiths, and dome mountains.
400
a molten mixture of rock-forming substances, gases and water from the mantle
What is magma?
500
The San Andreas Fault is classified as this type of fault.
What is a strike-slip fault
500
Explain in detail the process of volcanic eruptions.
What is the force of expanding gases pushes magma from the magma chamber through the pipe until it flows or explodes out of the vent.
500
an opening in the earth's surface where hot gasses and liquids from earth's interior are released
What is a vent
500
This is why magma flows to a side vent
What is a crack in the rock layers might offer less resistance to the magma's flow than the magma-filled main pipe.
500
the bowl-shaped area that forms around a volcano's central vent