Do iMovie Projects or Events contain used audio files or photos?

If you move or duplicate an iMovie Project and Events, will that clone include audio files and photos you pulled into the project (either from the desktop or the Music or Photo tabs of the Media Browser)? In other words, if I take that moved project to a different computer to edit, will I get missing media because those audio and photo files aren't on the computer now being used for editing? If that's the case, has anyone come up with a workflow that easily contains all media used in a project? Any help appreciated.