This document categorizes different types of questions and their purposes. Yes/no questions verify facts or events, while who, what, when, where questions seek specific information or facts. How and why questions aim to make sense of information, analyze topics, or clarify understanding. Comparing and contrasting questions analyze similarities and differences, while predictive questions forecast or hypothesize outcomes or consequences. Open-ended questions requiring justification, critique, or judgment are considered higher-order thinking skills.