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What is the International Date Line?

  • A.It is the Equator
  • B.It is the \(0^{0}\) Longitude
  • C.It is the \(90^{0}\) Longitude
  • D.It is the \(180^{0}\) Longitude

Answer: D

The International Date Line is, broadly, the 1800 longitude.

It runs through the Pacific Ocean, mostly along the 180° meridian, opposite the prime meridian, and bends round island groups so that no country is split between two dates. Crossing it westward adds a day, and crossing it eastward takes one away.

The Equator is a line of latitude, not longitude. 0° longitude is the prime meridian through Greenwich, which sets Greenwich time but not the date change. 90° longitude has no special role in timekeeping.

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