AP World History: Modern — Unit 2: Networks of Exchange (c. 1200–1450)

What AP World History: Modern Unit 2 covers

The College Board Course and Exam Description breaks Unit 2 into 7 topics:

1. 2.1 The Silk Roads
2. 2.2 The Mongol Empire and the Making of the Modern World
3. 2.3 Exchange in the Indian Ocean
4. 2.4 Trans-Saharan Trade Routes
5. 2.5 Cultural Consequences of Connectivity
6. 2.6 Environmental Consequences of Connectivity
7. 2.7 Comparison of Economic Exchange

AP World History: Modern Unit 2 practice questions

• You're a merchant loading a camel for a 4,000-mile trek from China to the Mediterranean. Camels carry about 300 pounds. You can haul grain or silk — but only one makes you rich. Which do you pick, and why?

  Silk — only high-value, low-weight goods justified the slow, costly overland trek. Grain would cost more to transport than it's worth, so the Silk Roads carried luxuries. It's economics, not preference.

• You're a Persian silk trader bedding down for the night at a roadside inn. At dinner, you sit next to a Chinese porcelain dealer, an Indian spice merchant, and a Mongol diplomat. By morning, you've traded recipes, religious ideas, and news from four civilizations. What are these inns called?

  Caravansarais — inns spaced a day apart along the Silk Roads. They offered shelter from bandits, but their real role was as melting pots where traders swapped ideas, technologies, and beliefs.

• You deposit 1,000 coins at a bank in Hangzhou and get a slip of paper. Three months later, 3,000 miles away in Kashgar, you hand over that paper and get your money. Your grandfather would call this magic. What's the innovation?

  Paper money and bills of credit ('flying money') that replaced hauling coins. Deposit here, withdraw there — trade moved at the speed of paper, not metal. It expanded the Silk Roads as much as any road.

• Chinese peasants in the Yangzi River delta make a decision that would terrify their grandparents: they STOP growing food and start producing silk and porcelain for distant markets instead. They'll buy their rice. What term describes this risky economic shift?

  Proto-industrialization — producing far more than locals use, for export. It's risky because you now depend on trade to eat: if war or plague cuts the routes, you starve. But the profits are huge.

• Two cities became filthy rich for the same simple reason: they're surrounded by desert, and they're the ONLY places with water for hundreds of miles. Every Silk Road merchant has no choice but to stop there. Name one, and explain why geography = wealth.

  Kashgar or Samarkand — oasis cities where trade routes converged in the desert. Merchants MUST stop for water, creating captive markets that taxed and supplied every passing caravan.

• A baby is born clutching a blood clot — a Mongol omen of future greatness. He grows up to unite warring nomadic tribes, build the largest contiguous land empire in history, and earn a title meaning 'universal ruler.' Who is he?

  Temüjin, who took the title Chinggis (Genghis) Khan in 1206. He unified the Mongol tribes not just through military brilliance but through organizational genius — his decimal system (units of 10, 100, 1,000, 10,000) made his armies devastatingly efficient even when outnumbered.

• A Mongol army of 50,000 faces a Chinese army of 500,000. The Mongols win. Not a fluke — they win battles like this REPEATEDLY. How does a smaller force keep beating a larger one?

  Three advantages: organization, weaponry, and psychological warfare. Decimal units enabled precise commands; composite bows outranged foes; and they spared cities that surrendered but massacred those that resisted, so many just opened their gates.

• After decades of brutal conquest, the Mongol Empire enters a golden age of peace. For the first time in history, a merchant can travel from Beijing to Budapest under ONE authority's protection. What's this era called, and why does it transform global trade?

  The Pax Mongolica — Mongol peace over the entire Silk Roads. One empire meant one set of rules, one tax system, and protection from bandits. The Mongols profited by making trade safe and taxing everyone.

+ 32 more AP World History: Modern cards in the app.

Key terms in Unit 2

These 12 terms show up in the Unit 2 cards. Each one links to its definition in the AP World History: Modern key-term reference.

• bubonic plague
• Columbian Exchange
• Dar al-Islam
• Enlightenment
• globalization
• gunpowder empires
• Indian Ocean trade
• Industrial Revolution
• Mongol Empire
• monsoon winds
• Pax Mongolica
• Yuan Dynasty