This is slow moving lava, that has high viscosity and high silica
What is Aa
100
These types of eruptions involve low viscosity and low silica content, where magma and gases bubble out gently.
What is a quiet eruption
100
These high landforms are created by repeated layers of lava flows.
What are lava plateaus
100
This the term given to magma when it hardens in a volcanoes pipe, then the softer rock around the pipe wears away, exposing the hard rock.
What is a volcanic neck
100
This is the chamber of molten rock located beneath the Earth's crust.
What is a magma chamber
200
This is the term given to a liquids ability to flow.
What is Viscosity
200
These are large projectiles of lava that can sometimes be as large as this classroom
What are lava bombs
200
These gently sloping landforms are created by quiet eruptions and layers of lava.
What are shield volcanoes
200
This is when magma forces itself across rock layers and hardens
What are dikes
200
This is the place where lava and gases leave a volcano
What is the vent
300
Groundwater that is heated by a nearby body of magma, then rises to the surface and collects in a natural pool.
What is a hot spring
300
These eruptions involve high viscosity magma and high silica content, that clock the volcanoes pipe and build up pressure, then throw lava, ash, cinders and lava bombs high into the air.
What are explosive volcanoes
300
These cone-shaped steep-sided volcanoes are created by explosive layers of lava, ash and cinder.
What are cinder cones
300
This is when magma squeezes between rock layers and hardens.
What is a sill
300
This is a long tube in the ground that connects the magma chamber to the vent.
What is the pipe
400
This is fast moving lava that that has low viscosity and low silica content. One of Mr. Wilson's favorite key terms
What is Pahoehoe
400
This is another favorite key term for Mr. Wilson, and involves explosive eruptions that hurl out a mixture of hot gases, ash, cinders, and lava bombs that travel at high speeds and level everything in their path.
What are pyroclastic flows
400
These steep and broad volcanoes are formed by alternating layers of lava, ash and cinders.
What are composite volcanoes
400
When magma cools inside the Earth's crust and creates a mass of hard rock.
What is Batholith
400
This is the bowl-shaped area at the top of a volcano around the central vent
What is a crater
500
This is the term given to water heated by magma that is used to provide heat and electricity.
What is Geothermal Energy
500
This is another term for the material that erupts from volcanoes; this material includes lava bombs, ash and cinders.
What is tephra
500
These huge holes are left by the collapse of a volcanic mountain.
What are caldera
500
A fountain of water and steam that erupts from the ground at regular intervals, like Old Faithful
What is a Geyser
500
This is the term given to the area where magma/lava pours out the vent.