Geography · Textbook solutions

International Date Line

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 18 questions

Exercise

18 q
  1. Ex Q1
    Two boxes in different hemispheres are given in the following diagram. The IDL passes through both the boxes. In one box, the meridian, day and date is given. Find the day and date for the other box. (A) 150° E Meridian, Monday, 15th August → IDL → 150° W Meridian, ......... (B) 80° E Meridian, ......... ← IDL ← 170° W Meridian, Sunday 25th December
  2. Select the correct option :
    Ex Q2(1)
    While crossing the IDL, a person will have to add one day when travelling from
    1. A.
      East to West
    2. B.
      West to East
    3. C.
      South to North
    4. D.
      North to South
  3. Ex Q2(2)
    If it is Wednesday 10 a.m. at 15° E meridian, then what will be the time at IDL?
    1. A.
      Wednesday 6 a.m.
    2. B.
      Wednesday 9 p.m.
    3. C.
      Thursday 2 p.m.
    4. D.
      Thursday 6 p.m.
  4. Ex Q2(3)
    According to the international convention, at which meridian does the day and date change occurs?
    1. A.
      0°
    2. B.
      90° E
    3. C.
      90° W
    4. D.
      180°
  5. Ex Q2(4)
    At which direction of the IDL does a new day start immediately?
    1. A.
      East
    2. B.
      West
    3. C.
      North
    4. D.
      South
  6. Ex Q2(5)
    IDL brings coordination in which of the following?
    1. A.
      GPS system
    2. B.
      Defence departments
    3. C.
      Transportation schedules
    4. D.
      Determining the hemisphere
  7. Give geographical reasons.
    Ex Q3(1)
    IDL is proving to be very useful in today's times.
  8. Ex Q3(2)
    The day starts in Pacific Ocean on the earth.
  9. Write in brief:
    Ex Q4(1)
    What considerations have been made while deciding the IDL?
  10. Ex Q4(2)
    While crossing the IDL, what changes will you make?
  11. Ex Q4(3)
    Why is the IDL not a straight line like the 180° meridian?
  12. Ex Q4(4)
    Why doesn't the IDL pass through land?
  13. Ex Q4(5)
    Why is the IDL considered with respect to the 180° meridian only?
  14. Using an atlas, tell in which of the following routes the IDL will be crossed and show them on the map.
    Ex Q5(1)
    Mumbai- London- New York- Los Angeles- Tokyo
  15. Ex Q5(2)
    Delhi- Kolkata- Singapore- Melbourne
  16. Ex Q5(3)
    Kolkata- Hong Kong- Tokyo- San Francisco
  17. Ex Q5(4)
    Chennai-Singapore- Tokyo- Sydney- Santiago
  18. Ex Q5(5)
    Delhi-London-New York