A persuasive speech is a specific type of speech in which the speaker has a goal of convincing the audience to accept his/her point of view. The speech is arranged in such a was as to hopefully cause the audience to accept all or part of the expressed view. Though the overarching goal of a persuasive speech is to convince the audience to accept a perspective, not all audiences can be convinced by a single speech and not all perspectives can persuade the audience.

Example of a persuasive speech

There is little doubt that the planet is warming. Over the last century, the planets temperature has risen around 1 degree fahrenheit (0.6 of a degree celsius). The warmest since the mid 1800's was the 1990's. The hottest year recorded were 1997, 1998, 2001, 2002, and 2003. 

Expository speaking is a five minute informative speech that introduces to the audience a topic of the student's choosing. The speaker should provide unique insights and explore interesting implications. At its core Expository speaking is an informative speech. Students doing Expository may cover topics ranging from an organization to a product, a process or concept. Effective speeches provide new information or perspectives on a topic, including those that are widely known. 

Example of a expository speech

String Theory
The world we live in today is constantly advancing in terms of science and technology. Due to the Internet, the information about recent scientific discoveries...