Every scene has the same structure. Here it is:
1. Transition, preferably with hook.
2. Rising action and dialogue
3. Turning point of the scene (the place where something changes forever)
(if there's no point, the scene goes, no matter how well written)
4. End/resolution of the scene, preferably with another hook. Usually when we come to the end of a scene,
* * *
we indicate it with the double line break, at least two extra lines of "white space" and most people use the three stars, a line, or some other indication, in case the line break falls at the bottom of a page.
Your publisher may bless you for those stars, too, because some typesetting programs eliminate all blank lines, effectively erasing all your double line spaces and turning your careful scenes into one long block of text.
Above all, be consistent. Don't use two blank lines one time, one the next and none the next, don't use the tab for indents sometimes and a row of space bands another. This makes your copy "hard to work with."