| Term | Definition |
| Missouri Compromise | allowed Missouri to enter as a slave state |
| Missouri Compromise | Allowed Maine to enter as a free state |
| Missouri Compromise | Line at 36 30'N separates the Louisiana Purchase into free (north) and slave (south) states |
| Compromise of 1850 | allowed California to enter as a free state |
| Compromise of 1850 | allowed territories of the Mexican Cession (NM & AZ) to use popular sovereignty |
| Compromise of 1850 | outlawed the slave trade in Washington D.C. |
| Compromise of 1850 | enacted the Fugitive Slave Law |
| Popular Sovereignty | allowed settlers in a territory to vote on whether or not to enter the union as a free state or a slave state |
| Dred Scott Decision | declared that slaves were property |
| Dred Scott Decision | because slaves were deemed as property... slavery was allowed in all territories |
| Dred Scott Decision | proved the Missouri Compromise to be unconstitutional |