Expository speeches are the most fun for audiences because the information is engaging and allows listeners to visualize the topic. Using colorful adjectives and adverbs, these speeches tend to grab audiences quickly and keep them compelled when delivered correctly. There are three types of expository speeches, with an array of topics under each type.
Idea or Process Speeches
Idea or process speeches explain an object or concept. Examples of titles in this category are "How an iPod Works," "How a Flower Grows from a Seed," "How a Plane Stays In the Air," "How Electricity Works," "How a Storm System Moves" and "How Yeast Rises."
Past or Current Events
The past or current events expository speech describes a specific event. The event can relate to any noun or pronoun, including yourself, or any time in history. Sample topics in this area are "A Brief History of Bioterrorism," "Events Leading to the Civil War (or any war)," "An Overview of the Burning Man Event," "Preparations for a Trip," "Preparing for a Move to a New Neighborhood," "My Entrance to High School," "What I Did on my Summer Vacation" and "The Social Impact of AIDS."
The definition speech discusses the principal parts of a subject. This speech is open to tangible, current or visible topics. Some topics include, "What is autism?," "What is an RSS feed?," "What is a hurricane?," "What is a tornado?," "Seven Deadly Sins," "Fetal Alcohol Syndrome," "What is Intelligence?," "Brain Waves and Communication Between the Left and Right Brain" and "The Witness Security Program."
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