A definition speech explains the meaning, theory, or philosophy of a specific topic that the audience likely does not know much about. The topics may be general, such as a sport, or highly specific, like a particular person. The main goal of this speech is to educate the audience so that they understand the main points regarding this subject. 

A demonstration speech explains how to do something. If you have ever sat through a lecture where a teacher explained how to create a bibliography, then you have heard a demonstration speech. Like most informative speeches, a how-to speech will likely use visual examples that show the audience how to move from step to step through a particular activity. Visualizations help the audience retain what each step looks like, increasing the likelihood that they will retain the overall information of the speech.

An explanatory speech might give a description of the state of a given topic. As an example, consider the types of speeches that are given at industry conferences. The goal of these speeches is for the speaker to inform the audience on a particular part of an industry. Commonly, these will also utilize visualizations that give the audience a visual representation of the particular data or statistics contained in the speech. This is one way to condense highly complex information into an easily retainable package for the audience.

A descriptive speech creates a vivid picture in a person's mind regarding an object, person, animal, or place. An archaeologist who has discovered a new temple in South America or a paleontologist who believes they have found a new dinosaur may use a descriptive speech to inform an interested audience about their recent discoveries .

1)speeches about objects 

provide a comprehensive overview of your object as topic.

2)speeches about processes  is the manner in which something is created, made, done, or works. An informative speech about a process then describes how something is made, done, or works.

3)Speeches about Events Any occurrence that happens is regarded as an "event." A speech about an event then, describes the occurrence in full: the time, date, location, and circumstances of that occurrence. 

4)Speeches about concepts is refer to ideas, beliefs, theories, attitudes, and principles. When speaking about concepts, you may have to find concrete ideas in order to make abstract ideas more relatable and tangible to your audience

For the purposes of this type of informative speech, anything that is visible and tangible is considered an object. Object speeches seek to impart knowledge about this object to the audience. 

3.Speeches About Processes

A process is the manner in which something is created, made, done, or works. An informative speech about a process then describes how something is made, done, or works. 

4.Speeches About Events

Any occurrence that happens is regarded as an "event." A speech about an event then, describes the occurrence in full: the time, date, location, and circumstances of that occurrence.

1. Speeches about objects

2. Speeches about processes 

3. Speeches about events

4. Speeches about concepts 

As all of these types make clear, there are many ways that a given set of information can be communicated in a speech. When deciding what type of informative speech you want to write and deliver, consider what you want the audience to know about your topic

Firstly, the speeches about objects. Object speeches seek to impart knowledge about this object to the audience. It's important that object speeches have a purpose, using the examples. 

Secondly, the speeches about processes. The process includes the way something is created, made or done. It describes how something is made. Informative process speeches work to help your audience both understand the process.

Thirdly, the speeches about event. A speech about an event describe the time, date and location. Like all informative speeches, event speeches must also serve a purpose.

Lastly, the speeches about concepts. Concepts refers to an idea, theories and also attitudes. When you’re speaking about the concept, you may have to find a concrete ideas for your audience. 

Speeches About Objects

For the purposes of this type of informative speech, anything that is visible and tangible is considered an object. Object speeches seek to impart knowledge about this object to the audience. Whether your object is the human body or the most recent episode of Family Guy, informative object speeches provide a comprehensive overview of your object as topic.

It's important that object speeches have a purpose: using our previous examples, you may discuss the complex, myriad ways in which the endocrine system functions and how it regulates metabolism; similarly, you may describe how Family Guy serves as a modern form of satire in pop culture. It's one thing to spout off facts about an object, but there must be a purpose to those facts.

Speeches About Processes

A process is the manner in which something is created, made, done, or works. An informative speech about a process then describes how something is made, done, or works. Processes could include anything from how the modern electoral college works to how an ice cream sandwich is made on the factory line. Informative process speeches work to help your audience both understand the process, and possibly be able to replicate the process for themselves (if applicable).

Speeches About Events

Any occurrence that happens is regarded as an "event." A speech about an event then, describes the occurrence in full: the time, date, location, and circumstances of that occurrence. Like all informative speeches, event speeches must also serve a purpose. You may talk about how the Battles of Lexington and Concord came to be known as the "shot heard 'round the world," or describe the experience of your first week at college. In either case, your speech must have a purpose to it.

Speeches About Concepts

Concepts refer to ideas, beliefs, theories, attitudes, and/or principles. When speaking about concepts, you may have to find concrete ideas in order to make abstract ideas more relatable and tangible to your audience. Whether discussing the theory of the origins of the universe to whether there's any truth to the phrase "love at first sight," concept speeches break down complex ideas into manageable chunks of understanding for your audience.

Crafting an Effective Informative Speech

A narrowly focused speech topic can really hone in on an object, process, event, or concept, thus making it easier for the audience to understand that topic. A broadly chosen topic usually entails lots of different kinds of information, which might complicate the informative quality of a speech and confuse the audience members. A narrowed focus also makes researching more manageable for the speech writer and increases his or her ability to understand that topic thoroughly before presenting it to others.

When writing an informative speech, pick out a small number of key points on your specific topic that you want the audience to take away from your speech. Use these points to develop an organizational structure to your speech, which should include an introduction, body, and conclusion. This structure will provide a trajectory that guides your audience as you elaborate the key points of information. Having a structure gives you, as the speaker, an opportunity to introduce the key points in the introduction and revisit them in the conclusion, increasing the likelihood that the audience will walk away with the key knowledge about your topic.

Explanatory:

An explanatory speech might give a description of the state of a given topic. As an example, consider the types of speeches that are given at industry conferences. The goal of these speeches is for the speaker to inform the audience on a particular part of an industry. Commonly, these will also utilize visualizations that give the audience a visual representation of the particular data or statistics contained in the speech. This is one way to condense highly complex information into an easily retainable package for the audience.

Demonstrative:
A demonstration speech explains how to do something. If you have ever sat through a lecture where a teacher explained how to create a bibliography, then you have heard a demonstration speech. Like most informative speeches, a how-to speech will likely use visual examples that show the audience how to move from step to step through a particular activity. Visualizations help the audience retain what each step looks like, increasing the likelihood that they will retain the overall information of the speech.