always container same container however volume change Gas Solid fill Liquid
:
such
as
ice
;
it
keeps
its
shape
and
occupies
the
space
,
which
mean
its
volume
does
not
change
.
:
such
as
water
;
it
does
not
keep
its
shape
but
takes
the
shape
of
its
.
Its
does
not
,
.
:
such
as
steam
;
it
does
not
keep
its
shape
and
expands
to
its
,
so
its
volume
also
changes
.