Question

which details from the article support the idea that life in the 1950s was different for black people in the north than it was in the south

Answer 1

Cause they did not have to worry about segergation but the rest did

Answer 2

Can't answer this, since we don't have the article. If there are details about how black people in the north were freed from slavery in most states, while slavery was still allowed in the south, you could use that.