How do I split/merge/manage/name "Moments"?

Is there any way that I can manipulate how these "Moments" are organized in the Photos app on iOS 8? I'm looking to do something similar to the "Events" in the current version of iPhoto. For instance:

1. Last week, my son had his first day of preschool and I took photos of that. Later that day, I was at a baseball game. These are two distinctly different "Moments", but the app automatically groups them together because they were on the same day. How do I split them?

2. My family went on a 3-day camping trip. In iPhoto, I was able to combine all three days into one "Event" on iPhoto, but Photos keeps them as three separate "Moments". How do I merge them?

3. These "Moments" are automatically named by their location. How can I change the name (i.e., change the "where we were" to "what we were doing") of the "Moment" so I can organize my photos in a way that makes sense to me?