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
Bronze age (Copper and tin) (an alloy of metals)
Since 1300 B.C.