31
Lesson 31 of 84 · Industrial Revolution
Key Figures: John Adams and Thomas Paine
Historical photographs provide visual evidence. Images of the Civil War, the Great Depression, and the Civil Rights Movement let us see history through the eyes of those who lived it.
Key Facts
1
Primary sources come from the time of the event.
2
Historians use evidence to support claims.
3
Timelines show events in order.
Timeline
1787
The U.S. Constitution is written
1791
The Bill of Rights is ratified
1803
The Louisiana Purchase doubles the size of the U.S.
Check Your Understanding
Question 1
1 of 2What is a primary source?