AP World History / Unit 4
Unit 4 · 12–15%
Transoceanic Interconnections
Oceans become the main highways of empire, trade, and exchange.
Topics
- Maritime technology and European voyages
- Columbian Exchange
- Atlantic slave trade
- Silver and global commerce
- Plantation systems
Lessons
Key terms
Original practice
Marlow Works questions. If this unit does not have its own items yet, you will see other questions from the same course.
Which development best explains why Song China was able to support a large urban population?
Original Marlow Works item — not a College Board question.
Take your time—this is practice, not a test.
Review checklist
- 01Explain the Columbian Exchange as a system, not a list of crops.
- 02Connect Atlantic plantations to labor demand in the Americas.
- 03Name one economic and one demographic consequence of transoceanic contact.
Related resources
External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.
Official / link only
AP World History: Modern course page
Official College Board course scope, units, and exam updates.
College Board · All rights reserved · accessed 2026-10-01
Do not copy CED prose, graphics, or sample questions.
Open sourceCC BY — attribution required
World History Volume 1: to 1500
Open textbook useful for AP World background through 1500.
Open Textbook Library listing · CC BY · accessed 2026-10-01
Verify the exact item license on the source page before republishing text.
Open sourceCC BY-SA — attribution and ShareAlike
World History: Cultures, States, and Societies to 1500
Open textbook for comparative regional history before 1500.
Open Textbook Library listing · CC BY-SA · accessed 2026-10-01
Open source