We
would
say
that
the
oxygen
we
breathe
is
made
of
____________________
,
small
units
that
compose
____________________
.
We
can
not
see
oxygen
going
inside
our
nose
because
it
is
in
a
____________________
state
,
where
the
atoms
are
very
far
apart
.
However
the
oxygen
has
matter
and
therefore
____________________
,
which
can
be
calculate
with
the
help
of
a
____________________
and
a
____________________
with
bottoms
,
sides
and
top
so
the
gas
do
not
scape
and
mix
with
the
air
.
