What is the difference between a histogram and a bar graph?

a histogram has intervals a bar graph does not

AnswerA histogram has all the bars smooshed together while a bar graph has them apart.

A bit more detail:

A histogram looks sort of like mountains, valleys, and peaks. It goes up and down, depending on how the numbers change, with no break in between. A bar graph has columns which are straight up and down, with breaks (spaces) in between the columns.