vocabulary
the top of the volcano that is blown off
Caldera
A steep-sided, often cone-shaped volcano.
composite volcano
the cloud that comes out of the crater during an eruption.
What is an ash cloud
This is where two plates move away from each other.
Divergent Boundaries
smaller openings in a volcano from which magma erupts.
secondary vent
a dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed.
pyroclastic flow
broad volcano with gentle sloping sides
Shield Volcano
The part of the volcano that the magma rises through
What is the main vent
A tectonic boundary where two plates are moving toward each other
convergent boundaries
a volcano that is erupting or considered likely to do so in the future.
What is an active volcano
Earth's crust is composed of a number of individual plates that change shape and position over time
Plate Tectonics
a volcano that has steep angled sides, throws blobs of lava in the air that fall as cinders, and is built over a short period of time.
what is a cinder cone
the spot where the magma is stored in the volcano
an area under the Earth’s crust where magma is hotter than surrounding magma.
hot spot
fine particles of rock dust blown from an explosion vent
What is ash
volcanoes that have not erupted in a long time but are expected to erupt again in the future.
what is Dormant
another name for a composite volcano
what is a strato volcano
the smaller vent that comes from the main vent
when two plates slide along each other
what is a transform boundary
the weak point in the Earth's crust where hot magma has been able to rise from the magma chamber and reach the surface
those which have not erupted in human history
What is extinct volcano
the volcano that the lava piles up around the vent
What is lava Dome
the large destructive pieces of ash, cinder and lava that forms a large projectile
When one plate goes under another plate
What is subduction zone
the solid and rigid outer layer of our planet. It includes the crust and part of the upper mantle that contains rigid rocks.
What is lithosphere