Well I have a 7 hour homework project about history. We have to find out about our long lost relatives, what were there jobs, where did they live, what information can you find out about them

How can we help with this, they are supposed to be your relatives? Start asking your family.

Your task, studying your family and tracing of their history, belongs to the field of genealogy:
Genealogy - Wikipedia, the free encyclopedia
You will probably find help if you Google for that.