It allowed territories to made final decisions on slavery issues according to popular sovereignty.
Explanation
This act of 1854 repealed the Missouri Compromise of 1820.The principle of popular sovereignty was applied in this act to allow the extension f slavery territories beyond the states at the South. This Act facilitated the starting of the Republican party.
The Kansas-Nebraska act made it possible for the Kansas and Nebraska territories (shown in orange) to open to slavery. here's a link to the answer. http://www.ushistory.org/us/31a.asp
Here is another link that is much easier to read. http://www.historyplace.com/lincoln/kansas.htm
