The reason why America chose a Bicameral System was because, one the framers and the americans knew the system from England, and it showed balance between powers of the government and of the people which help set up the Nation we have today.
Hope this Helps
The extension of slavery into the western territories.
For a specific instance, see the landmark supreme court case Dred Scott v. Sandford.
The Black Death inspired a lot of fear because it kills silently and indiscriminately. Since the plague comes from a type of bacteria, it can spread very easily from host to host. The disease is most commonly found in house rats. These house rats are often found in people's houses which made the disease even scarier. It spread throughout the entire world and killing off a huge number of people really fast. This is the terror of the black death.
The Louisiana Purchase opened up the United States at the time to the Midwest
