- 
  
  The California Goldrush brought a lot of immigrants in search of a better life. It also brought Americans living in the east over to the west.
- 
  
  This allowed for the construction of the transcontinental railroad. This railroad helped to connect the two ends of the country and transport goods and materials.
- 
  
  This railway was crucial to the economy and development of America. It was a large factor in the industrial revolution.
- 
  
  Invented by Alexander Graham Bell, The telephone helped us to have a new way of communicating.
- 
  
  This marked the end of the reconstruction era in the south. This occurred because of the civil war.
- 
  
  The Chinese exclusion act was signed and caused an end to Chinese immigration in the United States.
- 
  
  Ellis Island was an immigrant processing center and helped many new Americans come to the country safely.
- 
  
  The boom in immigration really helped to build America's population and economy. These new immigrants helped bring new cultures and life to America