Score music refers to background music in films that can be pre-existing or written specifically for scenes, while sound effects are short sounds added during editing to enhance or create noises like footsteps. Both score music and sound effects are added to films to emphasize different elements, with score music being musical pieces and sound effects being brief ambient sounds.

2. Score music is the music that plays in the background
of a film or during certain scenes in the film. The score
music can be music that has been already made or it
can be written specifically.

3. Sound effects are sounds that are used in films to
enhance or create a sound. An example of a sound
effect would be footsteps coming down a stairs. Sound
effects can be added into films during editing.

4. Sound effects are different from score notes as score
notes are pieces of music, where as sound effects are
short sounds. However, both are added to films to
emphasise different things at certain points in the film.