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The Chinese developed the first compass as early as the 3rd century B.C.E. The first Chinese compasses were pieces of a magnetic mineral called lodestone. Earth itself is like a giant magnet with north and south poles.
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Within China, people often traveled by boat on rivers or across lakes. An innovation of a vessel called a paddlewheel boat made this type of travel must faster.
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The printer first drew characters (symbols) on paper. He then glued the paper to a wooden block. When the glue was dry, the printer carved out the wood around the characters, leaving the characters raised on the wood.
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B.C. For several thousand years, tea—made by letting tea leaves steep in boiling water—was drunk mostly as medicine. However, by the 8th century C.E., tea had become a hugely popular everyday beverage throughout China.
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The Development of the Mechanical Clock The Chinese developed the first mechanical clock in about the 8th
century. The new clock was more accurate than earlier timekeeping devices, such as sundials and hourglasses. The
Chinese devised a wheel that made one complete turn every 24 hours. Dripping water made the wheel turn. Every quarter hour, drums would beat; and every hour, a bell would chime. The sounds let people know what time it was. -
Game cards were invented in China in about the 9th century. Printers used woodblock printing to make the cards from thick paper. Famous artists drew the designs that appeared on the backs of the cards.
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Alchemists Chinese alchemists experimented with a mineral called saltpeter. They may have believed that saltpeter could extend life. Perhaps by accident, they discovered that it could be used to make an explosive powder. In 850 C.E., during the Tang dynasty, alchemists recorded a formula for gunpowder. They warned others to avoid it because it was extremely
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Rocket technology was developed in China during the Song dynasty. Rockets were powered by a black powder made of saltpeter, charcoal, and sulfur. At first, rockets were used only in fireworks. Later, the Chinese used them as weapons. They even developed a two-stage rocket for their armies. rocket through the air. The second stage dropped arrows down on the enemy.
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Movable type consists of separate blocks for each character. Printers made their type by carving characters out of clay and baking them. To print, they selected the characters they needed and placed them in an iron frame in the order they would appear on the page.
