source 12

http://www.mnsu.edu/emuseum/prehistory/china/timeline.html 1. mnsu.edu
2. don't know
3. none
4. this source shows me when the Qin dynasty was and what other dynasties were before and after the Qin dynasty
5. yes
6. because the timeline is just to show when some events happened and when they ended and when the next event started.