[DOC] [TLE] J! Archive - Show #6055, aired 2010-12-31 [PAR] Around 3500 B.C. people were mixing copper & arsenic to make this; they soon 
found copper & tin worked better... [DOC] [TLE] Chapter 4: The Bronze Age - MyGeologyPage [PAR] But as demand rose and the first early ore discoveries were worked out, they 
mined ... but a physical mix of two or more metals that may act as if it were a 
different metal. ... Almost all copper ores contain some small proportion of arsenic
, tin, zinc, .... Now more than 40 ancient sites of tin mining have been discovered 
in the... [DOC] [TLE] What is Bronze? - History of Metals - Quatr.us [PAR] (Early on, people tried mixing copper with other things like lead and arsenic, but 
... When West Asian smiths first began to make bronze, about 3500 BC, it was 
very expensive. ... Africans in Egypt and Sudan to use more bronze around 1700 
BC. ... Pueblos or Brazil learned how to work metal, they went straight to using 
iron,... [DOC] [TLE] History of Bronze Infographic | About | Website | Makin Metal ... [PAR] From early Bronze Age tools to modern day industrial applications and its ... 
Around 3500 BC the first signs of bronze usage by the ancient Sumerians started 
to ... that bronze may have been discovered when copper and tin-rich rocks were 
used ... heated by the fire, the metals contained in the rocks were melted and 
mixed. [DOC] [TLE] Arsenical bronze - Wikipedia [PAR] Arsenical bronze is an alloy in which arsenic is added to copper as opposed to, 
or in addition to tin or other constituent metals, to make bronze. The use of 
arsenic with copper, either as the secondary constituent or with another 
component such as tin, results in a stronger final product and better casting 
behaviour. ... Whilst arsenic was most likely originally mixed with copper as a 
result of the... [DOC] [TLE] COPPER AGE, BRONZE AGE AND IRON AGE | Facts and Details [PAR] It lasted from about 4500 B.C. to 3500 B.C., overlapping with the early Bronze 
Age. ... Copper was the first metal to be worked by man on a relatively large scale 
in part ... Around 4500 B.C. people discovered that the copper ore, when heated 
to ... they were crushed with stone pestles and then mixed with arsenic to lower 
the... [DOC] [TLE] BRONZE, TIN, MINING AND TRADE IN MESOPOTAMIA | Facts and ... [PAR] Bronze was easier to cast in molds than copper and much harder, with the ... 
Scholars have yet to learn how the ancient Mesopotamians got the idea of mixing 
tin ... produced tin-bronze pins, axes and other artifacts from as early as 3000 
B.C. In ... technology, and they were exploiting tin for trade all around the Middle 
East. [DOC] [TLE] 3 Major Periods of Metal Age: Copper, Bronze and Iron Age [PAR] Three major periodsCopper Age, Bronze Age and Iron Age were chalked out: 
... copper implements came into use in Mesopotamia between 4000 BC and 
3500 BC. ... But as it was hard for the early people to extract copper from the ores, 
they .... Because they found some copper ores produced a metal that cast better 
and... [DOC] [TLE] Bronze Age [PAR] EBA - Early Bronze Age (c.3500-2000 BC); MBA - Middle Bronze Age ... Copper 
was usually mixed with arsenic, yet the growing demand for tin ... ( Southeast 
Asia) bronze artifacts have been discovered dating to 2100 BC . .... Later on, 
However, as the Chavin became more experienced in bronze-working 
technology they... [DOC] [TLE] So today we're gonna be talking about iron and steel. So as you ... [PAR] Number one was there was a growing scarcity of copper and tin. ... So if you want 
to understand iron and steel, you have to start with bronze and say okay, bronze 
was an alloy, an alloy of copper mixed with either arsenic or tin. .... So when they 
were trying to figure this out early on, they didn't understand what was going on... [DOC]

Question: Around 3500 B.C. people were mixing copper & arsenic to make this: they soon found copper & tin worked better
Answer: bronze