| A | B |
| Howard Blair | reveals that students have been exposed to Darwin's theory |
| Rachel Brown | school teacher, the Reverend's daughter, Cates' girlfriend |
| Mr. Meeker | baliff |
| Bert Cates | Science teacher arrested for reading a page from Origin of Species |
| Reverend Jeremiah Brown | Rachel's father; feels Cates is a sinner |
| E.K. Hornbeck | reporter from the Baltimore Herald |
| Matthew Brady | famous and religious; prosecutor in trial |
| Sarah Brady | Brady's motherly wife |
| Henry Drummond | defense attorney; disliked by Hillsboro |
| drama | a story told in dialogue by performers before an audience |
| act | different parts that dramas are divided |
| scene | different parts within an act |
| set | recreation of settings on the stage |
| props | physical objects that characters use |
| script | contains stage directions and dialogue for the actors |
| dialogue | conversation between characters |
| stage directions | printed in italics, describe how the characters would move or act before an audience |
| defendant | charged with a crime |
| defense attorney | wants to prove that the accused is innocent |
| prosecutor | wants to prove that the accused in guilty |
| judge | determines the sentence |
| jury | after hearing the evidence, determines if the accused is guilty or innocent |
| Scopes Trial | Science teacher John T. Scopes was tried for teaching Darwin's Theory of Evolution |
| Creationism | God created everything |
| Darwinism | Darwin's theory that humans evolved from a lesser species |