Unit 1 Mapping: Time Zones September 21st 2016 Ms. Seillier Grade 9 Geography What is a Time Zone? ● Each colour represents a different time zone. ● A Time Zone is an area on the earth that shares the same standard time. ● Within each of these colours the time is the same. ● Time zones tend to follow the boundaries of countries. ● So if it is 1:30pm in Ottawa, What time is it in Iqaluit? How many Time Zones are there? ● Remember Longitude? You know those vertical lines that run from pole to pole…. ● Every 15 longitudinal degrees, the time changes by an hour. ● This creates 24 Time Zones around the world. ● 360 divided by 24 = 15 ● Another way to remember.. How many hours in a day?
In Summary A brief history Sir Sandford Since the late 19th century, the Prime Meridian at Greenwich has ● Trains GMT Fleming been the reference point for GMT. ● Before this, towns around the kept its own local time (Examples Scotland born Canadian Sir What would happen if trains Greenwich Mean Time (GMT) in previous video) Sandford Fleming developed traveling along a shared track originally known as the “mean ● When railways and communication networks expanded there was the Time Zones after missing had different times? solar time” at the Royal an urgent need around the world for international time standards. his train. Observatory in Greenwich, London , which later became adopted as a Universal time ● Learn more at https://goo.gl/1WGkTV standard (UT) What runs through Greenwich? Universal Time How do Time Zones work? The Prime Meridian marks the middle of a Time Zone that marks Universal The earth rotates from east to west. Sun rises in the East and sets in the West. ● Time (UT). Time Zones that are east of the Prime Meridian are Ahead of the UT. Remember that each time zone extends 15 degrees. ● ● That means there are 7.5 degrees on each side of the Prime Meridian. Times Zones that are west of the Prime Meridian are Behind the UT Time in other zones is compared to the UT. ● Some countries change the shape of their time zone. 0 Newfoundland has a half hour time zone because St John’s sits on a time zone line. 7.5 degrees 7.5 degrees International Date Line Created because Sailors going around the earth arrived home a day ahead or behind those who stayed behind. It follows the 180 degree line of Longitude This line zig-zags to landmases or groups of islands. If you cross the date line going west = you add a day If you cross the date line going east = you loss a day
Daylight Saving Time Time Zones Worksheet: World Have you heard the expression “Spring Forward” or “Fall Back” Practice (with Teacher) 1. Christina lives in London, England. If she updates her blog at 7 p.m., at what time will the update be visible to her readers in California? 2. If newscasters begin reporting on an earthquake in Beijing at 4 a.m., at what time will viewers in New York see the coverage? 3. The flight from Chicago to Moscow is 20 hours long. If a plane leaves Chicago at 4:30 p.m, on January 26th, what time and day will it arrive in Moscow? What do you think? Should we still use Daylight Saving Time? Time Zones Worksheet: Canada Instructions: 1. What are Canada’s Time zones called? 2. Answer the questions on the back
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