A
____________________
forms
when
____________________
air
and
____________________
air
meet
and
they
start
to
____________________
around
each
other
,
this
forms
a
type
of
____________________
(
this
means
a
tall
____________________
of
air
that
moves
around
in
a
____________________
,
just
like
the
spiral
you
see
in
____________________
when
you
pull
the
plug
in
a
____________________
)
which
,
reaches
down
to
the
____________________
.
