What is referred to as an effect that a slide makes when it appears in a presentation?

The term that describes the effect a slide makes when it appears in a presentation is called a transition. Transitions are the visual effects that occur as one slide moves off the screen and the next slide moves onto the screen. These can include various styles, such as fades, wipes, or pushes, and they serve to enhance the flow of the presentation, making it more engaging for the audience.

Transitions help to create a smooth progression between slides, allowing viewers to follow the narrative of the presentation more easily. They contribute to the overall pacing and visual appeal, drawing attention and emphasizing the change from one slide to the next. Options like animation, while related, specifically pertain to effects applied to individual elements within a slide rather than the slide itself. Thus, the correct choice effectively captures the essence of what happens during the shift between slides.