Half Life Problems Worksheet Answers. A worksheet, in the word’s original meaning, is usually a sheet of paper where one performs work. This is a printed page a child finishes using a writing tool. No other materials are needed. It’s”a sheet of paper on which workouts, working time, special instructions, etc. are recorded. A piece or scrap of paper on which problems, ideas, or so on, are put down in tentative form.” In education, a worksheet may have questions for students and places to record answers. In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns where an accountant may record information or perform calculations.