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The magnetic compass was used to find the direction of things.
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Porcelain is beatiful pottery that is sturdy but looks delicate. Porcelain dinnerware is still called China.
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Steel is made from iron but is less brittle and is easier to bend into different shapes.
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The mechanical clock was used to complete one full turn every 24 hours. dripping water was used to make the wheel turn
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the Chinese have been drinking tea since 2700 bce, but it became more popular in the 8th century
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Before paper money was invented, the only currency was coins.
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Accidentally discovered by alchemists who were looking for secret to eternal life.
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The movable type was used to type but had to print it on paper to appear.
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Paper was useful for recording and transmitting info
