Here is the Chapter 8 Test Review and answers. It took me 5 pages of work to show the answers, sorry it's 5 separate pages, I didn't know how to scan all once.
Like I said in yesterday's update, don't obsess over doing both the review and the online Big Ideas practice test, I'd say start with the practice test so you can get used to the format and then if there is a question you didn't get correct on the practice test, then you can do the same type on the review.
Good luck!