Where are they?
Volcanoes are common along these types of plate boundaries
Convergent and divergent plate boundaries
This is a liquids resistance to flow.
viscosity
this is a vent leading away from the magma chamber
Pipe/volcano
Layer upon layer of this type of rock has created the Columbia Plateau
Basalt
This is a scorching hot cloud of ash and gas move rapidly down a volcanoes slope
pyroclastic flow
Volcanoes erupt because mantle rock does this
Melts
This is a place in the Earth's crust where magma collects
Magma chamber
These explosive volcanoes are made from felsic to intermediate rock
composite
This forms when large amounts of fluid flows over a large area.
Plateau
These are volcanoes that have erupted recently but are not currently active
dormant
Earth is home to about 50 of these structures
Hotspots
This is the material that erupts from a volcano
Tephra
This is the most common type of volcano
Cinder cone
Half of these are located in the United States
geysers
A volcano that is about to erupt may produce a series of these.
Earthquakes
This lowers the melting point of subducting plates in a convergent boundary
Water
When mafic magma pushes up through fissures in the surface of Earth
effusive eruption
Volcanoes that explode violently have magma that is high in this physical property
viscosity
If there is not enough magma or pressure to create and explosive eruption this may form instead.
Lava dome
This is a high-speed pyroclastic flow in which melted snow creates a mudflow
lahar
These structure mark subductions zones
Ocean trenches
When pressure inside a capped volcano is released suddenly
explosive eruption
The largest super volcano in North America is located here.
Yellowstone National Park
These are devices that measure a volcanoes slope
Tiltometers
Temperature, deformation and gas volume can now be measured using this technology.
Satellites