Tammy and Joe 2ND Collaborative post-define word

Sans serif and serif are different typefaces. Serif fonts have a thick/thin contrast and the sans serif are generally more monoweight. According to The Non-Designer's Design Book you are not able to contrast the type effictively using the contrast structure alone. You should change the size or weight.

Oldstyles of typefaces always have serifs, the lower case letters are always at an angle and were based on the handlettering of scribes. Modern serifs are are more horizontal and are very thin.

Sans serif are those withput any horizontal slants at the end of the strokes. Sans means without in French. They are usually no thick or thin transitions in the stokes, they are monoweight, but some do have a slight thick/thin transition.