AIM: How is Longitude related to Time Zones?

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• AIM How is Longitude related to Time Zones?

When have you experienced a change in time zones?
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I. Local Time

• Earth rotates counterclockwise (West to the East
• It takes the Earth 24 hours to rotate through 360

What is the Rate of Change for Earths rotation?
Earth has a rotation of 15/hour
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II. Time Zones

• set up using meridians (lines of longitude)
  spaced at 15 intervals.
• Starting at the Prime Meridian (00) and ending at
  the International Date Line (1800)

If times zones are spaced 150 apart, what is the
difference in hours between two time zones?
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Who experiences morning first compared to the
Prime meridian?
East of the prime meridian experience the morning
first.
AM PM
Remember Earth rotates from the West to the
East.
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Review Questions

• 1) If it is 12 Noon at 0 longitude, what time is
  it at 30 W?

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• 2) If it is 12 Noon at 0 longitude, what time is
  it at 45 E?