Question

how does a dissolve differ from a fade?

a dissolve is a transitional cut, whereas a fade is not.

a dissolves transition occurs simultaneously on the screen, whereas a black screen separates the two parts of a fade.

a dissolve can be used to mark a connection between two shots, whereas a fade cannot.

a dissolve emphasizes the image, whereas a fade does not.

a dissolve can be used to mark the passing of time, whereas a fade cannot.

Explanation:

A dissolve shows two shots overlapping simultaneously on screen, blending one into the other. A fade involves a shot transitioning to or from a black screen, which acts as a separator between the end of one segment and the start of another. The other options are incorrect: both dissolves and fades are transitional cuts, both can mark connections or passage of time, and neither inherently emphasizes an image over the other.

Answer:

A dissolve's transition occurs simultaneously on the screen, whereas a black screen separates the two parts of a fade.