19. How did the Song Dynasty contribute to advances in transportation? by inventing gunpowder by inventing paper money by inventing sail boats by inventing the magnetic compass 20. How did Nerva attempt to improve the Roman economy? He raised taxes on imports to increase trade. He revised the banking and money systems. He helped to control inflation by fixing prices. He granted land to help small farmers. 21. Why did the Chinese require the Portuguese to pay for goods in gold and silver when trading? The imperial government wanted to stockpile gold and silver. Portuguese and Chinese currencies were not exchangeable. Portuguese goods were less valuable than Chinese goods. The Chinese already had a surplus of Portuguese goods. 22. Why did the Chinese silk trade die during the Ming Dynasty? The Chinese drove the silkworms to extinction by overusing them. The Europeans learned the process and could make their own silk. The European desire for silk diminished and the demand was reduced. The Chinese used water routes, and silk could not travel over water.
19. by inventing the magnetic compass (but it was also invented in Europe) 20. He granted land to help small farmers 21. The Chinese already had a surplus of Portuguese goods 22. The European desire for silk diminished and the demand was reduced. bbut there wa smany mor important factors like Ottoman domination and dimishing of silk rode and marine tarde between Europa and China