This document defines and provides criteria for the genres of science fiction and fantasy. It states that fantasy involves imaginary worlds where magic is common, while science fiction features improbable elements like advanced technology or altered histories made possible. Examples are provided that fit the criteria, such as Charlotte's Web representing fantasy with its talking animals, and June 29, 1999 fitting science fiction with its depiction of aliens. Discussion questions are also included to analyze whether certain works exemplify these genres.