a
.
Pure
substances
only
consist
of
one
type
of
____________________
.
b
.
____________________
in
space
is
almost
zero
.
c
.
Talc
is
the
softest
____________________
.
d
.
Oil
is
not
____________________
in
water
.
e
.
Paper
is
a
good
heat
____________________
.
f
.
Buoyancy
is
an
____________________
force
.
g
.
Every
substance
that
enters
liquid
experiences
two
opposing
____________________
.
h
.
For
an
object
to
float
,
its
density
has
to
be
lower
than
the
density
the
____________________
it
is
in
.
i
.
If
an
object
has
greater
____________________
than
the
liquid
it
is
in
,
it
will
____________________
.
j
.
If
an
object
is
less
dense
that
the
liquid
it
is
in
,
it
will
____________________
.
