volcano 2 answers
where do most volcanoes erupt
Along divergent plate boundaries
magma contains _____ gases, including carbon dioxide and sulfur dioxide
dissolved
magma that is rich in gases will form a volcano that
erupts explosively
T or F: a caldera is a large volcano that forms at a divergent plate boundary
false
True or False? the ring of fire is a group of hawaiian shield volcaones
false
volcanoes form when magma
flows through the crust
a ____ is not associated with any plate boundary
hot spot
T or F: a cinder cone volcano is a small volcano with steep sides
true
T or F: composite volcanoes often form at convergent plate boundaries
true
Viscosity is a liquid's resistance to flow.
true
Volcanos that are not associated with plate boundaries are called hot spots
true
mount shasta
most likely to erupt
eruption style depends on the magma's viscosity and the
amount of dissolved gases in the magma
a ____ is small and steep- sided and it erupts basaltic lava
cinder cone volcano
a ____ is large, steep-sided, occurs along convergent plate boundaries and results from explosive eruptions
composite volcano
____ is molten rock that flows along Earth's surface
lava
lassen peak
least likely to erupt
mount baker
least likely to erupt
____ is present beneath Earth's surface
magma
Mount St. Helens
most likely to erupt
glacier peak
most likely to erupt
a fast moving cloud of hot gas, ash, and rock from an erupting volcano is a
pyroclastic flow
___ volcanoes have gentle slopes of basaltic lava; they are commonly located along divergent boundaries and ocean hot spots
shield
a large volcano with gentle slopes
shield volcano
volcanoes form along convergent boundaries as a result of
subduction and rising magma
which is NOT a volcanic hazard
subduction of tectonic plates at a boundary
magmas resistance to flow is called its
viscosity
when magma erupts explosively, it can send particles of rock and glass or _____ into the air
volcanic ash
molten rocks erupt form a
volcano
