73
Lesson 73 of 84 · U.S. History
Westward Expansion
The Silk Road was a network of trade routes connecting China to the Mediterranean. Merchants carried silk, spices, and ideas across thousands of miles, linking diverse civilizations.
Key Facts
1
Historians use evidence to support claims.
2
Timelines show events in order.
3
Cause and effect explain why things happen.
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 2Why do we study history?