Every
object
in
the
Universe
is
made
by
____________________
.
____________________
has
____________________
and
takes
up
____________________
and
it
is
formed
by
small
particles
called
____________________
.
Depending
on
which
atoms
constitue
the
substance
,
it
has
physical
properties
such
as
density
,
length
and
mass
that
can
be
____________________
and
the
result
given
in
the
units
of
the
____________________
____________________
.
The
ratio
between
the
mass
and
the
volume
of
an
object
is
called
____________________
and
it
gives
the
idea
of
how
____________________
is
____________________
in
a
given
volume
of
the
substance
.
Atoms
can
join
to
form
____________________
.
____________________
are
those
substances
formed
only
by
one
type
of
atom
whereas
a
____________________
is
a
substance
formed
by
molecules
.
Both
elements
and
compunds
are
____________________
____________________
because
they
are
formed
by
a
single
type
of
particles
.
When
two
or
more
pure
substances
are
mixed
,
they
form
a
____________________
,
which
can
be
____________________
(
if
we
can't
distinguish
the
components
)
or
____________________
(
if
we
can
identify
the
different
components
)
.
