The North and the South grew apart, because they had very different opinions on slavery and if they should have it or not. They had different perspectives on almost EVERYTHING!
Hope this helped :)
Answer: Yes
Explanation: After an interregnum of shared power, Robespierre became dictator, and the Terror started in earnest.
The answer should be false
Nagasaki and Hiroshima.
Radiation, I think? Research this one to be sure though. All of the others seem fairly obvious.