The ruling in the Dred Scott case was so significant because it addressed

whether or not slavery was morally right or wrong.

whether African Americans – both enslaved and free – had basic citizenship rights.

whether slavery should be allowed in the South.

whether territories could outlaw slavery.

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.