90%
band
Composite
hazardous
oozing
chunks
vents
growing
deadly
flows
200
crust
breathe
geothermal
active
melts
burning
Earth's
rifts
slabs
rises
sticking
gentle
hotspot
shift
plates
heat
80%
2000
provide
slopes
79
destroyers
spewing
hardens
molten
magma
openings
rest
ash
restless
tectonic
shield
scientists
A
few
hundred
years
ago
,
____________________
believed
that
volcanoes
were
____________________
mountains
of
fire
.
today
we
know
they're
really
____________________
or
____________________
to
the
hot
interior
of
the
planet
.
About
1500
volcanoes
around
the
world
are
classified
as
____________________
.
Nearly
____________________
of
these
____________________
in
the
Ring
of
Fire
,
a
____________________
circling
the
pacific
ocean
.
Their
location
is
no
accident
.
While
the
____________________
surface
looks
stable
,
its
____________________
is
made
up
of
immense
____________________
of
rock
like
puzzle
pieces
that
constantly
____________________
.
Where
these
tectonic
____________________
interact
volcanoes
often
form
.
Friction
from
shifting
plates
____________________
the
Earth's
crust
causing
rock
beneath
the
crust
to
liquify
.
This
____________________
rock
or
____________________
then
becomes
a
volcano
by
erupting
through
____________________
in
the
plates
.
Once
magma
escapes
from
the
earth
,
it's
called
lava
.
But
not
all
lava
is
the
same
.
Running
lava
____________________
quickly
and
forms
the
general
____________________
of
____________________
volcanoes
.
Thick
,
____________________
lava
doesn't
flow
as
far
and
tends
to
form
the
steeper
slopes
of
composite
volcanoes
.
____________________
volcanoes
can
erupt
violently
hurling
ash
and
lava
at
speeds
up
to
____________________
miles
per
hour
.
These
eruptions
sometimes
blow
away
large
____________________
of
the
volcano
itself
.
Some
volcanoes
like
Hawaii's
Kilauea
forms
a
____________________
in
the
Earth's
crust
where
magma
____________________
in
the
middle
of
a
____________________
plate
.
Kilauea
is
one
of
the
most
active
volcanoes
on
the
planet
and
has
erupted
continuously
since
1983
.
Because
Kilauea
is
a
shield
volcano
,
this
constant
eruption
is
a
____________________
one
.
Lava
____________________
from
Kilauea
constantly
____________________
into
new
land
,
making
Hawaii
the
only
state
that
is
still
____________________
.
Living
near
a
volcano
can
be
____________________
as
the
residents
of
Pompeii
learned
in
the
year
____________________
AD
when
mount
Vesuvius
erupted
,
____________________
superheated
____________________
,
poisonous
gas
and
rocks
.
This
____________________
combination
called
the
pyroclastic
flow
is
far
more
dangerous
than
the
lava
flow
.
Vesuvius
buried
Pompeii
claiming
the
lives
of
____________________
people
.
Though
volcanoes
can
be
deadly
,
they
also
____________________
benefits
.
Volcanoes
created
____________________
of
the
Earth's
surface
as
well
as
much
of
the
air
we
____________________
today
.
Volcanoes
create
rich
soil
for
farming
and
many
countries
harvest
their
subsurface
____________________
to
create
____________________
energy
.
Both
creators
and
____________________
,
volcanoes
prove
that
beneath
its
calm
surface
earth
remains
a
living
planet
and
a
____________________
one
.