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WorksheetsVolcanoes
Total questions: 10
Worksheet time: 5mins
What happens as a tectonic plate moves over a hot spot?
The plate descends into the mantle.
A chain of volcanoes form.
The pressure of the plate keeps magma below Earth’s surface.
The hot spot is pushed to the edge of the plate.
Volcanoes that form far from plate boundaries are associated with
ocean ridges
divergent boundaries
subduction zones
hot spots
Most volcanoes form ___________.
at hot spots
at plate boundaries
in the center of ocean plates
in the middle of continents
What caused this type of volcanism in the Cascades Mountains (Mt. St. Helen's, Mt. Shasta)?
hot spots
ocean-ocean subduction
ocean-continent subduction
continent-continent collision
Hawaiian volcanoes are caused by what type of volcanism, which does not occur on plate boundary?
hot spots
ocean-ocean subduction
ocean-continent subduction
continent-continent collision
Which statement about basaltic magma is false?
It has high viscosity.
It forms on oceanic and continental crust.
It forms when rocks in the upper mantle melt.
It contains small amounts of silica.
Rhyolitic magma-fueled volcanoes are especially explosive because rhyolitic magma is highly viscous and contains a large volume of trapped gas.
True
False
The most explosive volcanoes are _____________.
cinder cones
hot spots
shield volcanoes
composite volcanoes
The most dangerous volcano in the US is Yellowstone National Park. What type of volcanism is Yellowstone?
oceanic hot spot
continental hot spot
ocean-continent subduction
ocean-ocean subduction
Which type of eruption poses the least risk?
Icelandic
Hawaiian
Vulcanian
Strombolian
Plinian
