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Flip Charts
Volcanic Eruptions
Earth Science - Middle School
❮
1
/
2
❯
Types
of
Eruptions
There
are
two
types
of
eruptions—quiet
and
explosive.
Quiet
eruptions
are
non-explosive
and
occur
in
volcanoes
with
low-viscosity,
low-silica
magma.
The
fast-moving
lava
flows
out
of
the
vent
and
across
the
surface
of
the
land.
Explosive
eruptions
occur
in
volcanoes
with
thick,
high-
viscosity
magma
that
is
high
in
silica.
Magma
builds
up
within
the
volcano's
pipe
rather
than
flowing
out.
Pressure
increases
until
an
explosive
eruption
occurs.
magma
lava
ow
vents
Volcanic
Material
&
Rocks
Volcanic
material
can
be
found
in
all
different
sizes
from
tiny
ash
particles,
to
cinders,
to
large
pieces
called
volcanic
bombs.
Pyroclastic
Flow
and
Lahar
Explosive
eruptions
release
a
mixture
called
a
pyroclastic
flow
made
up
of
hot
ash,
rocks
and
gases.
A
fast-moving
mudflow
called
a
lahar
can
also
form
during
an
explosive
eruption.
Obsidian,
pumice,
basalt,
and
rhyolite
are
all
igneous
rocks
that
form
from
volcanic
eruptions.
pyroclastic
flow
lahar
obsidian
pumice
pumice
magma
reservoir
lava
vents
lava
flow
cinders
volcanic
bombs
basalt
rhyolite
Volcanic
Eruptions
© Copyright NewPath Learning. All Rights Reserved. 94-4537
Visit
www.newpathlearning.com
for
Online
Learning
Resources.
Photos
courtesy
of
USGS
& NOAA.
Pause
and
Review
Identify
and
describe
the
two
types
of
eruptions
volcanoes
may
have.
Volcanic
Eruptions
Type:
_______________________________________________________________________
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Type:
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© Copyright NewPath Learning. All Rights Reserved. 94-4537
Visit
www.newpathlearning.com
for
Online
Learning
Resources.
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