1.
soft,malleable,reddish brown metal
2.
treatment of raw ore to separate waste
4.
site where copper is extracted
6.
that can be restored into a new object
8.
something made of copper and used for
9.
an area to remove soil and uncover material
10.
a widely used surface technique
11.
a mineral deposit containing copper
12.
an alloy of copper and zinc
