____________________
was
the
first
metal
used
.
This
was
used
to
make
____________________
and
ornaments
.
Copper
,
bronze
and
iron
came
later
.
In
the
____________________
Age
people
learnt
that
heating
the
metal
made
it
easier
to
forge
.
In
the
____________________
Age
some
____________________
mixed
copper
with
tin
to
create
bronze
.
Bronze
was
harder
than
copper
.
In
the
____________________
Age
they
made
weapons
and
tools
because
iron
is
harder
than
the
other
ones
and
much
more
resistant
.
Metal
goods
developed
____________________
.
Sailing
and
the
invention
of
the
____________________
made
it
easier
to
transport
good
over
long
____________________
.
