How do you think the ghettos facilitated the eventual extermination of the jews?
2. why might ghettos have been an entirely eastern phenomenon, not built in germany or other nazi controlled areas?
3. how did jews maintain hope within the ghetto?
4. how did the invasion of the soviet union differ from that of poland?
5. how did operation barbarossa pave the way for the final solution?

The ghettos facilitated the eventual extermination because they were hurdled up in one place.
Ghettos were an Eastern phenomenon because of space and money issues which were more common in eastern Europe than in Germany. 
Jews maintained hope through praying and through hoping that they would be able to sneak out of the country to somewhere else.
The invasion of the Soviet Union differed because the Soviet Union put up a much harder fight and wasn't overrun as was Poland at the time.