20 Warm-up/Review questions about the Nature of Science. Topics include observation/inference, variables, Scientific Method, measurement, volume, density and graphs.Use in a variety of ways including:Print the worksheet (all questions) and give to students - grade at the end of 4 weeks.Print one of the 4 weekly sheetsPick and choose questions, write on the board or project with the included PowerPoint slides - students copy and answer the question in their notebooks, review the answer(s) togethe