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ICSE Class 9 Geography Question 15 of 22

Geographic Grid: Latitudes and Longitudes — Question 9

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Question

Question 3(a)

State the meaning of the International Date Line.

Answer

The line of longitude 180° is one and the same for east or west of the Prime Meridian. Since it is diametrically opposite to the Greenwich Meridian, it causes a time difference of a full day on crossing the line.

The International Date Line is the 180° line. When crossing this date line from the west to east a day is deducted or the time is fixed backward by one day. When crossing the International Date Line, from east to west, a day is added.