AP®︎ US History: Topic 9.6 Practice Test
Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 9.6 of AP US History – Challenges of the 21st Century.
Questions List
Topic 9.6
Question 1 Easy
This question tests the following: KC-9.3.II.A
Which event on U.S. soil on September 11, 2001, led to widespread global consequences?
What You’re Being Tested On:
Explore the learning objectives taken directly from the College Board’s AP® U.S. History Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.

Topic 9.6: Challenges of the 21st Century
Thematic Focus: America in the WorldWOR
Diplomatic, economic, cultural, and military interactions between empires, nations, and peoples shape the development of America and America’s increasingly important role in the world.
Learning Objective: Unit 9: Learning Objective F
Explain the causes and effects of the domestic and international challenges the United States has faced in the 21st century.
Historical Developments: KC-9.3.II.A
In the wake of attacks on the World Trade Center and the Pentagon in 2001, the United States launched military efforts against terrorism and lengthy, controversial conflicts in Afghanistan and Iraq.
Historical Developments: KC-9.3.II.B
The war on terrorism sought to improve security within the United States but also raised questions about the protection of civil liberties and human rights.
Historical Developments: KC-9.3.II.C
Conflicts in the Middle East and concerns about climate change led to debates over U.S. dependence on fossil fuels and the impact of economic consumption on the environment.
Historical Developments: KC-9.3.II.D
Despite economic and foreign policy challenges, the United States continued as the world’s leading superpower in the 21st century.