Okay kiddo, imagine you are watching a movie and suddenly the scene changes. That change is what we call a film transition.
There are different kinds of film transitions. One of them is called a cut. It's like when you cut a picture from a magazine and glue it to a piece of paper. The difference is that in a movie, when we cut from one scene to another it's done super fast, so it looks like a seamless change.
Another type of transition is called a fade. It's like slowly turning down the volume on a song until you can't hear it anymore. So in a movie, we slowly make the current scene fade away until it's completely gone, and then the new scene appears.
There's also a type of transition called a dissolve. It's like mixing two different colors of paint together until they become one. In a movie, we use a dissolve to mix two scenes together, so you can see a little bit of both scenes at the same time before one of them disappears completely.
Overall, transitions help make movies more interesting and helps us understand when one scene ends and another begins.