34
Lesson 34 of 84 · Westward Expansion
The Louisiana Purchase
Primary sources — letters, photographs, diaries, speeches — were created at the time of an event. They give firsthand evidence of what people experienced and thought.
Key Facts
1
Oral histories preserve community stories.
2
Primary sources come from the time of the event.
3
Historians use evidence to support claims.
Check Your Understanding
Question 1
1 of 2What is an artifact?