A sketch is a rapidly executed freehand drawing that is not usually intended as a finished work. A sketch may serve a number of purposes: it can be used to record something that the artist sees, develop an idea for later use or as a quick way of graphically demonstrating an image, idea or principal. wikipedia.org

Realist painters render everyday characters, situations, dilemmas, and objects, all in a "true-to-life" manner. Realists tend to discard theatrical drama, lofty subjects and classical forms of art in favor of commonplace themes.