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750 BCE
Mechanical Clock
The Chinese devised a wheel that made one complete turn every 24 hours -
Period: 300 BCE to 1400
Chinese History
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250 BCE
Compass
The first Chinese compasses were pieces of a magnetic mineral called lodestone -
200 BCE
Steel
Steel was made from iron, but it is brittle than iron and easier to bend into other shapes -
150 BCE
Paper
Chinese paper was probably made from hemp and then bark of the mulbarry tree -
50
Porcelain
Porcelain is made by combining clay with minerals quartz and feldspar -
750
Paper Money
Paper money was printed with wood blocks. By 1107, Song printers were using many wood blocks each bill -
850
Gunpowder
Accidentally discovered by Chinese alchemist who were trying to find items that would make humans imortal -
850
Game cards
Famous artists drew designs that appeared on the back of the cards -
1300
Rockets
Rockets had spread through much of Asia and into Europe
