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Steel is made from iorn, but it is less brittle than iorn and easier to bend in different shapes.
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Paper is made from hemp and then the bark of the mulberry tree.
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The Chinese devised a wheel that made one complete turn every 24 hours. Dripping water made the wheel turn.
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A chemical made by accident when a person tried to make a potion that would make people immortal.
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Printers used
woodblock printing to make the cards from thick paper. Famous artists drew the designs that appeared on the backs
of the cards. -
Before that time, coins were the only form of currency. Like game cards, paper money was printed with wood blocks.
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Early flqamethrowers contained gun powder mixed with oil. The chinese used them to spray enemies with a stream of fire.
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The chinese use them to confuse their enemies and terrify their horses.
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Porcelain is made by combining clay with the minerals quartz and feldspar. The mixture is baked in a kiln, or pottery oven, at very high temperatures.
