Core & Ext. Metals: Extraction
Slide
5
of 45
Human
discovery
of
metals
Approximate dates
•
aluminium
(
zinc
,
lead
etc.)
Iron
age
Since
500
B.C.
(long before mum & Dad
thought about children)
Since
1900
A.D.
BEER
Bro
nze
age (
Copper
and
tin
)
(an
alloy
of metals)
Since
1300
B.C.