In the movie to kill a mocking bird there is many different changes from the book. The first real big change from the book to the movie Bob ewell went to the car and scared Jem and Scout when Atticus was inside talking to Helen Tom Robinson's wife. This is a significant change because they added the scene and it wasn't in the book and Bob ewell was drunk and it shows he has a drinking problem.

  Another significant piece that was in the book but wasn't in the movie. In the book Jem left his pants at the Radley's place when he got stuck on the fence and Mr.Radley shot his gun while all the kids were there.  they had to use the excuse that Jim doesn't have any pants because they were playing strip poker. But in the movie Jem went back right away to get his pants and that's when Mr. Radley shot his gun and everyone from the neighborhood came out.this is significant because the kids did not get yelled that for playing strip poker. 

The last significant change from the movie to the book. In the book when Tom Robinson tried to Escape at the jail he was shot 17 times and killed. In the book he tried to run and he was only shot once but that was only to try to wound him and it was a misaim and it killed Tom Robinson. This is significant because they were not trying to kill him. Rather in the book they were trying to kill him.