The purpose of a speech to inform is to provide information the audience does not already have. Even if the audience does have some general knowledge of your topic, an informative speech will give them new knowledge or more in-depth information on that topic. The informative speech does not advocate one idea over another, but remains nonpartisan.
Many speakers - both new and skilled - have difficulty distinguishing between an informative and persuasive speech. You must be able to identify the difference. This often happens while you are creating your speech: you have shifted the objective of the speech. This is why you need to continually refer back to your specific purpose statement. This will help you remain in focus of your purpose and your motive. And it is easy to see why these two types of speeches can be confused: both impart information. In fact, the strongest persuasive speech imparts new and in-depth information to support the thesis. The motive is the major difference. Ask yourself as you begin creating, while in the process of, and as you conclude the speech, "What is my motive here? What reasons do I want to give this audience this information?"
Some topics are easy to classify: a speech that urges you to donate blood is attempting to change or reinforce your behavior. The speech which identifies what donated blood is used for within the community would be an informative speech. A speech which discusses different world religions would be a speech to inform; a speech which advocates your own religion would be a speech to persuade. The line is not always clear: a demonstration of how to brush your teeth correctly (informative) versus the speech on the importance of good dental care (persuasive), for example.
General types of informative speeches:
Speeches about objects, people: These types of informative speeches are about things in our sensory and physical world - things you can see and hear and smell and feel and