21
Lesson 21 of 84 · Westward Expansion
The Dust Bowl and Its Causes
The Great Depression, triggered by the 1929 stock market crash, brought widespread poverty. President Roosevelt's New Deal programs provided relief, recovery, and reform.
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.
Check Your Understanding
Question 1
1 of 2What is a primary source?