Stippling is the drawing technique!
A scene can mean two things. A scene can be the setting of a story, or (what I think you are referring to) it can be a segment of an Act of a play. A scene separation within a play is usually included in order to allow time for a change in setting during the performance. A chapter is a segment of a book. So, to summarize, a scene is a segment of a play and a chapter is a segment of a book.
wild lines are lines that actors repeat when they weren't clear enough to be heard the first time. Theatrical productions are live, and you cannot go back and change what has already been done.
Only one of the diatonic notes
