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General Purpose: To inform Specific purpose: To teach my audience about the different time zones around the world. Central idea: World time zones might be hard to understand but with the proper knowledge it can be easier to figure out. INTRODUCTION I. Attention Getting Material A. Imagine yourself landing half way around the world and having to be somewhere at a certain time, but you have no idea what time it is there and your phone isn’t working. B. Every air traveller calculates the plus or minus hours and has to rest their watches each time they land.

II. Orienting Material A. I found my information through the Polk Library and other credible sources. B. There are a few points I’m going to go over in this speech. First explaining what time zones are and then some history. C. Times zones can be confusing at first but with a little bit of knowledge when you travel it will be easier to know your times zones. (Connective: Let’s start off by first explaining what time zones are. ) BODY I. To start to understand time zones you need to know a few things. A.

According to David Adler, author of “Time Zones”, “In 1884 20 countries agreed to divide the world into 24 time zones, for the 24 hours in a day. ” (going to show a map of the time zones and explain how to add or subtract time) 1. The Greenwich Meridian was established as the starting point. 2. And numerous maps and diagrams help visualize these abstract boundaries, including the International Date Line in the Pacific. B. I realize not many of you have the opportunity to travel out of the country; there are a few time zones across the United States. going to show a map of the US and tell the zones) 1. Pacific 2. Mountain 3. Central 4. Eastern C. Also, David Alder, author of “Time Zones”, explains the impact of daylight savings time on the time zones. In his book he describes how noon and midnight occur simultaneously on opposite sides of the globe because of the time changes. (Connective: After learning some of those basics, let’s learn a little bit about some history. ) II. There are a few main points in time zone history. A. For the longest time each community used to tell time by the movement of the sun and the shadow it casted on the ground.

B. So, on one side of the Earth when to sun is the highest at midday, the other side is completely dark. C. According to the Greenwich Website, “The concept of standard time was adopted in the late 19th century in an attempt to end the confusion that was caused by each community’s use of its own solar time. This standard became increasingly necessary with the development of rapid railway systems and the consequent confusion of schedules because of the different local times kept in separate communities. ” D.

There used to be around 9 meridians around the world, so to create a better system the Greenwich Meridian was established, as previously explained. 1. According to the Greenwich Meridian Website, “In October 1884, on behalf of the President of the US, 41 delegates from 25 nations met in Washington, DC for the International Meridian Conference. ” 2. At this conference they officially made Greenwich the starting point of the time zones. (Connective: Let’s summarize. ) CONCLUSION I. Summary A. There are 24 world time zones for each hour of the day. B.

And as a part of those 24 time zones, there are 4 that run across the United States. C. In each time zone, daylights saving time is a big event. D. Standard time was developed in the 19th century to make traveling easier for communities. E. And the Greenwich Meridian was established as the starting point of the time zones in 1884. II. Clincher A. As a traveler, these are some great facts to know. B. And if there is still some confusion, no worries according to Stacy Jones, a writer for the New York Times, “There is a clock indicating the time in all of the world’s countries and times zones.

The clock face displays 24 hours and there is a projection of the world on the clock’s face centered at the South Pole. ” C. Now that itself would make me want to go travel and see it and figure out the time zones.

BIBLIOGRAPHY Jones, S. V. (1985, March 9). PATENT; Clock Shows the Time In All Countries, Zones. New York Times, pp. 39. Piehl, K. , ;amp; Adler, D. A. (2010, September). Review: “Time Zones”. School Library Journal, 56, 136-137. (2010, November 1). Greenwich Meridian Line . Retrieved November 5, 2010, from The Greenwich 2000® Network of Internet websites: http://wwp. greenwichmeridian. com/line. htm

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