Greenwich
Mean Time
and World Time Zones
When to Phone a Friend (and avoid an international incident)
"Grrrr! Why are you calling me in the middle of the night?!" |
Background
Baily lives in New York and one night after dinner she decided to give
her friend Max a call. Max recently moved to Venice, Italy, and she
wanted to see how he was doing in his new home. But Max's father answered
the phone sounding pretty grumpy, and he sternly told Baily that it
was after midnight there, and asked her why she would call in the middle
of the night when everyone was sleeping!
How could Baily have avoided this international incident? What to do? GMT to the Rescue!
Try
This!
Help Baily plan her next call to Max.
Schedule a call at a time when both Baily and Max are still awake. Using
the Time Zones map below, plan the call:
1) Using her local time, what time would Baily need to call Max so her call didn't wake up Max? (or his Dad!)
2) What local time would it be in Venice?
3) Once you've figured that out using local times, figure out what time Baily's call would take place using GMT.
4) Using your own local time, what time would you call Max?
| Map of World Time Zones |
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National Math Standards
Algebra:
Use
mathematical models to represent and understand quantitative relationships.
Geometry:
Specify
locations and describe spatial relationships using coordinate geometry
and other representational systems.
Measurement:
Understand
measurable attributes of objects and the units, systems, and processes
of measurement.
Apply appropriate techniques, tools, and formulas to determine measurements.
Problem
Solving:
Build new mathematical knowledge through problem solving.
Representations:
Use
representations to model and interpret physical, social, and mathematical
phenomena.
National Geography Standards
The
World in Spatial Terms:
How
to use maps and other geographic representations, tools, and technologies
to acquire, process, and report information.
How to analyze the spatial organization of people, places, and environments onEarth's surface.
Human
Systems:
How
forces of cooperation and conflict among people influence the division
and control of Earth's surface.
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