Vocabulary
What is lava?
liquid rock on the surface of the earth’s crust
What is the difference between magma and lava?
lava is on the outside of a volcano and magma is on the inside
What is a hot spot?
Place on Earth that are directly above rising magma
What is Shield?
Build from layers of lava released from nonexplosive eruptions over and over again. Gentle sloped
What is the importance of a volcano's slope
Steeper the slope, the greater the explosion
What is subduction?
When the oceanic plate melts in the mantle releasing molten gases mixed with dissolved water
What is Pahoehoe?
Lava with a low viscosity (moves slowly)
What is the difference between Calderas and a volcanic plug?
calderas is a crater around the vent and a plug is hardened magma covering the plug
What is a rift and what plate boundary does it occur at?
When the tectonic plates separate allowing magma to flow in between.
Occurs at the divergent plate boundary
What is a dike?
What is the ring of fire and what plates interact with each other?
Group of volcanos in the specific that are made via subduction and are created from either oceanic-oceanic or oceanic-continental plate interactions
How do Calderas form?
Magma melting rock just beneath the surface around the vent
Where are volcanos most commonly formed?
Plate boundaries (80%)
What plate interaction creates islands and why?
Continental-Continental because these plates do not sink they crumble creating islands in the Pacific
Why are composite volcanos so explosive?
Their height, layers of ash, cinder, and pyroclastic materials, oceanic-oceanic plates interacting