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How do volcanoes form at subduction zones?
Oceanic crust sinks beneath the crust
what is the Ring of fire?
The zone of volcanic activity surrounding the Pacific Ocean.
What are the types of pyroclasts?
Pumice, scoria and cinders
what's an alive volcano?
A volcano that will erupt
what's a plug?
volcanic object created when magma hardens within a vent on an active volcano
How do volcanoes form at divergent boundaries?
The plates rip apart
Magma is the hardened liquid inside of the volcano
lava is hot flowing liquid from that is on the outside of the volcano.
what is pluton?
a crystalline mass formed by plutonic rocks
what is a shield volcano?
A volcano that active and erupts basaltic lava
what's a tiltmeter?
Tiltmeters continuously measure the tilt of the ground surface
Hot spots
places on the earth surface that are directly above a column of rising magma
what's the Mid-Atlantic ridge volcano
The Mid-Atlantic Ridge is a mid-ocean ridge located along the floor of the Atlantic Ocean,.
what is volcanic ash?
It is a mixture of rock, mineral, and glass particles during a volcano eruption
Whas a cinder cone volcano?
It is a volcano that is very small and is pyroclastic
What are volcanologists?
a volcano scientists
where do most volcanoes form?
over hotspots, plate boundaries, divergent boundaries
what are the three parts of plate collisions?
0ceanic/oceanic
oceanic/continental
continental/continental
What is a extinct volcano?
A volcano that is not going to ever erupt again
What's a composite volcano?
A cone-shaped volcano that is built from several layers of lava, pumice, ash, and tephra
What is pyroclastic flow?
A dense, fast-moving flow of solidified lava pieces, volcanic ash, and hot gases
How do volcanoes grow
they can grow by intrusion when magma moves up inside the cone and remains there without erupting through the vent. Extrusion when magma and other materials come through the vent and pile up as lava on the outside.
what is the difference between pahoehoe and AA lava?
pahoehoe lava is a smooth lava
AA lava is a rough lava
What's a dormant volcano?
A volcano one that isn’t currently active or erupting,
what's a caldera?
Large bowl-shaped volcanic depression that forms on top of volcanoes
what is a bulging volcano?
A bulging volcano is a volcano that shrinks when is erupts