volcanoes
2 classification volcanoes
active and inactive
inactive or active?? record of eruption 600 years 10, 000 years ago
active
inactive or active? not erupted within 10,000yeras physical formed changed
inactive
three diff shapes and sizes of volcanoes
shield cinder composite cones
parts of volcano
summit slope base
two openings of volcano
crater, caldera
crater has a ____ shape
funnel
____ is formed when part of the wall of volcano collapses
caldera
how many crater does taal volcano have
47
three nature of eruption
magma's temperature, chemical composition, amount dissolved gases it contains
____is resistance to flow
viscosity
inside the volcano there is____ it has molten materials
lava
magma is ___ if daghan silica content
more viscous
magma low silica content
less viscous
low gas high silica content
very viscous
less of gases (lava)
more viscous
gases dissolved
less viscous
list the types of volcanic eruptions
phreatic or hydrothermal, phreatomagmatic, strombolian, vulcanian, plinian
what type of volcanic eruption when there is a stream driven eruption as the hot rocks come in contact with water.
phreatic or hydrothermal
what type of vol. eruption when there is a violent eruption to the contact between water and magma
phreatomagmatic
what type of vol. eruption when there is a periodic weak to violent eruption characterized bt fountain lava.
strombolian
what type of volcanic eruption is this when it id characterized by tall eruption columns that reach up to 20km high wi5h pyroclastic flow and ashfall tephra like that of paricutin volcano
vulcanian
what type of volcano is it when there is excessively explosve type of eruption of gas and pyroclastics just lke our pinatubo volcano in zambalez
plinian
volcanoes erupt differently, thwy are generally classified as wet and dry depending on?
the magma's water content
lava with low amount of gas as it rises has high viscosity that it piles up at a vent resulting in a ?
dome
lava with low amount of gas and high silica content are
very viscous
lava with high silica content is
too viscous to travel far
lava with less silica content has low viscosity that it can travel a great distance forming a
thin sheet
the higher the temperature is?
the lower its viscosity is