Plse heeppp 1. what events led to violence and bloodshed in kansas? 2. why did the dred scott decision lead to increased tensions between the north and south?

Slaveholders wanted to expand slavery west, and conflict broke out between anti-slavery and pro-slavery Americans in Kansas I.E Bloody Kansas. 
2. Because it set the precedent through the Supreme Court that blacks whether free or still in slavery were not citizens and were considered property (if slaves), therefore could not sue in court. The north was primarily against slavery whereas the South was pro-slavery. 

Wait u answered your own question

Thomas edison created the light bulb.