volcanos
how do they form
what is a volcano
were do volcanoes form
Volcano definition- they are a vent in earths crust that spews lava
magma definition- it is molten rock that flows up from the ground
volcanic eruptions constantly shape earths surface
tectonic plates move to make volcanos
60 potentially active volcanos
occur over hot spots
types of volcanos
:
cinder clones
shield
volcanic eruptions
lava flows are deadly
viscosity- a liquids distance to flow
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lava - same as magma just above surface
conver bount
sub zones
magma less dence
div bount
plates separate lav flows
hot spots
weak spots that flow lava
composit
large gental slopes
quied erouptions
allong div bount
large steep sides
explosive eruptions
on div bount
small steep sides
mederocor explosions
no bounties
parts of a volcano
vent
crater
pipe
Magma Chamber
side vent
ash cloud
lava flow
quiet
slowly go of
low vciscosity
kinna like water
explosive
high pressure
high viscous lava
top is plugged
Viscosity - it running ness of the lava
at volcanos
efects of volcanos
fires
storms in the clouds
pyvrastic flow
mount st hellens
started may 18,1980
march 16 , activity recorded
march 27 steam explosion
may small eruptions and lava
myths
pompe11
vacation place for wealthy
it was super advanced
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happened 1 day after fire vestal
13 to 20 ft of ash