| Question | Answer |
| lodestone | A magnetic mineral that was used in the first Chinese compasses. |
| canal lock | A gated Chamber in a canal used to raise and lower the water level. |
| compass | A navigational tool that points to the magnetic poles of the earth. |
| segmented arch bridge | A bridge supported by arches that are shallow segments (parts) of a circle. |
| paddle wheel boat | A boat developed in the 5th century that used a wheel arranged with a series of paddles as propulsion. |
| boat design | By the 2 century C.E., the Chinese had developed boats that had watertight compartments, which would limit the effects of a leak. |
| paper | The earliest Chinese paper was probably made with the bark of the mulberry tree. Later, they used rags. |
| movable type | Individual characters make of wood or metal that can be arranged to create a job for printing and then used over again. |
| paper money | Paper money was invented following a copper shortage, which was used for coin currency. |
| woodblock printing | Blocks are carved with characters (symbols)for a job. |
| porcelain | A hard, white pottery; also called "china". |
| mass-produced | to make similar items in quantity by using standardized designs and dividing labor among workers. |
| gunpowder | an explosive powder made of saltpeter and other materials. |
| alchemy | a combination of science, magic, and philosophy that was practiced in medieval times. |
| catapult | a slingshot-like war machine used for shooting rocks, shells, and other objects. |
| rocket | Developed during the Song dynasty, and used at first for fireworks, the Chinese later used them as weapons. |
| steel | Discovered before 200 B.C.E., it is made from iron, but is less brittle and easier to bend into different shapes. |
| mechanical clock | An accurate timepiece the Chinese invented in 1092 C.E. that used dripping water as its energy source. |
| inoculate | To protect against disease by transmitting a disease-causing agent to a person, stimulating the body's defense reactions. |
| vaccine | A substance used to immunize people against a disease. |
