WorksheetsFormation of Volcanoes
Total questions: 10
Worksheet time: 8mins
Which of the following most completely defines a volcano?
a cone-shaped structure on land where pyroclastic material is ejected
a partly molten region of Earth's mantle where subducting rock is melted
a ridge system between two diverging plates through which magma escapes
a vent or hole in Earth's surface through which magma or ash escapes
Which factor is most associated with the explosiveness of a volcano?
silica content
volcano size
magma color
location of the volcano
When magma has a high viscosity, how is it most likely to erupt?
quietly
explosively
constantly
most likely will not erupt
What process causes the volcanoes of the Hawaiian Islands to form?
subduction zones
divergent boundaries
hot spots
convergent boundaries
Which kind of volcanism is most likely to occur at location A in the following map?
Location A is a hot spot in oceanic crust, so it is likely to erupt lava with a low silica content, resulting in relatively quiet volcanism.
Location A is a hot spot in oceanic crust, so it is likely to erupt lava with a high silica content, resulting in explosive volcanism.
Location A is a mid-ocean ridge at a divergent boundary, so it is likely to erupt lava with a low silica content, resulting in relatively quiet volcanism.
Location A is a mid-ocean ridge at a divergent boundary, so it is likely to erupt lava with a high silica content, resulting in explosive volcanism.
A geologist notes that melted rock is escaping from Earth's interior at location A and identifies location A as a volcano. A student objects that location A is too far from any plate boundaries to be a volcano.
Is the student's objection correct? Why?
Yes; location A is too far from any plate boundaries to be a volcano.
No; although volcanoes can be located far from plate boundaries, volcanoes erupt lava and ash, not melted rock.
No; although many volcanoes are located at plate boundaries, volcanoes are also located far from plate boundaries at hot spots.
No; although volcanoes are located at plate boundaries only, location A is close enough to the boundary between the North American and Pacific plates to be a volcano.
How long can the finest ash particles from a volcanic eruption remain in the atmosphere?
between hours and days
between days and weeks
between weeks and months
between months and years
Which of the following is an example of a Divergent Plate Boundary?
Mid-Atlantic Ridge
Cascade Mountain Range
Hawaiian Islands
Which of the following is an example of Intraplate Volcanism?
Mid-Atlantic Ridge
Cascade Mountain Range
Hawaiian Islands
Which of the following is an example of a Convergent Plate Boundary?
Mid-Atlantic Ridge
Cascade Mountain Range
Hawaiian Islands
