Definitions (1)
is called a dead volcano because it will never erupt again
what is the extinct volcano
is called alive because it is likely to erupt again in the future
what is an active volcano
the mixture of hot gases, ash, and cinders that flow down the sides of a volcano when it erupts explosively
what is a pyroclastic flow
magma forces itself across rock layers
what is a dike
Pot of magma below Earth's surface
What is a Magma Chamber/Resevoir
the two types of eruptions
what are quiet and explosive eruptions
steep cone-shaped mountain
what is a cinder cone volcano
what is silica
result of a collapsed volcano
what is a caldera
the bowl-shaped part at the top of a volcano
what is the crater
magma deep within the earth that rises to the surface through a volcano
what is a hot spot
the kind of eruption that has low silica
what is an Island arc
a mass of rock formed when a large body of magma cools inside the crust
lava flowing down the sides of the volcano
what is lava flow
the kind of eruption with high silica which makes the magma sticky and clogs the pipe
what is an explosive eruption
the boundary where plates move away from eachother
what is the divergent boundary
The stages of Volcanic Activity
what are dormant, extinct and active volcanoes
forms when magma hardens in a volcanoes pipe and surrounding rock wears away
what is the volcanic neck
connects the magma chamber to the surface
bodies of hardened magma uplift to the surface
what is a dome mountain
what is a composite volcano
High elevation, with flat land where lava flows
what is a lava plateau
magma that squeezes between horizontal rock layers
what is a sill
opening at the top of a volcano