The document outlines several common conventions of science fiction films including setting them in the future, outer space, or alternative versions of earth. It also discusses including narratives focused on new technologies, scientific principles, or political systems, as well as conflicts between good and evil. Symbolism through futuristic props and costumes is used to represent scientific advancements. Film techniques like close-ups of technologies and special effects are employed to emphasize science elements and make fictional worlds more realistic.