Closure Questions

INFO:
According to the tips, after a week closed issues will hide themselves unless you specifically search for them. I just read on the forum that marking issues as verified does the same thing. I only seem to be able to set an issue as completed, not closed.

QUESTIONS:

• Does this mean that after you set an issue to completed, a week after you mark it as verified the status changes to Closed and it drops off the list?
• Does selecting "Unit Tested" affect the process at all?
• There are 13 states available for queries. Is there any documentation that explains what they are and how you get there?
• Is there any way to hide completed projects?

James