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AP U.S. History Practice Test 6

12 free AP U.S. History practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

AP U.S. History Practice Test 6Tutor mode

Question 1 of 12

Period 4: 1800-1848
U.S. cotton production, 1800–1840020040060080010001200140018001810182018301840YearThousands of bales

Figures rounded to thousands of bales. Source: U.S. Census Bureau, Historical Statistics of the United States.

Questions 18–21 refer to the graph.

Which innovation most directly contributed to the growth in cotton production shown on the chart?