Identify the similarities or differences between facts or examine the differences between ideas, facts, viewpoints, etc. Contrast Point out the differences between certain objects or characteristics. Criticise Point out the good and bad characteristics and give your own opinion after taking all the facts into account. Define Give a short and concise definition (i . e . a summary of essential properties) of a subject or topic. Describe Name the characteristics of an object or topic. You should do this in a logical, well-structured way. Discuss Discuss a topic by examining its various aspects. Use a critical approach. Evaluate Give your own opinion, using certain standards as a basis, about a topic.