Time Zone Basics
This is a region of Earth that is bound by longitudinal lines and shares the same time.
What is a time zone?
This city is located on the Prime Meridian.
What is Greenwich, England?
Before standard time, towns often set their clocks using this object in the sky.
What is the Sun?
This imaginary line separates one calendar day from the next.
What is the International Date Line?
Canada has this many time zones.
What is six?
There are this many standard time zones around the world
What is 24?
The Prime Meridian is located at this longitude
What is 0° longitude? [Lesson on...me Zones. | PowerPoint]
Railroads needed standardized time largely to prevent these.
What are train collisions?
The International Date Line is located approximately this many degrees from the Prime Meridian.
What is 180° longitude? (halfway around the world)
Toronto is located in this time zone.
What is Eastern Standard Time (EST)?
The Earth rotates this many degrees every hour.
What is 15 degrees?
This conference selected Greenwich as the Prime Meridian.
What was the International Meridian Conference?
This Canadian proposed the worldwide system of time zones in 1878.
Who was Sir Sandford Fleming?
When crossing the International Date Line travelling east, you do this.
What is subtract one day?
Vancouver is located in this time zone.
What is Pacific Standard Time (PST)?
Time zones are based on these lines that run north to south.
What are lines of longitude (meridians)?
Time in Greenwich is also known by this name.
What is Universal Time (UT) or Greenwich Mean Time (GMT)?
Fleming suggested dividing the world into this many time zones.
What is 24?
When crossing the International Date Line travelling west, you do this.
What is add one day?
Newfoundland Standard Time is how far ahead of Atlantic Standard Time?
What is 30 minutes?
The Earth takes this long to complete one full rotation.
What is 24 hours?
If Toronto is five time zones west of Greenwich and it is 12:00 noon in Greenwich, what time is it in Toronto?
What is 7:00 a.m.?
People once used these devices to tell time before modern clocks. Name two.
What are sundials, water clocks, or candles?
The International Date Line bends around these to avoid dividing them.
What are islands, countries, or landmasses?
If it is 3:00 p.m. in Winnipeg, what time is it in Halifax?
What is 5:00 p.m.? (Central → Eastern → Atlantic = +2 hours)