The International Date Line (IDL) is an imaginary line on the Earth's surface that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. When crossing the IDL, the date changes. The direction of travel determines whether a day is added or subtracted.
B) Wednesday. When a ship crosses the International Date Line on a westward voyage, it gains a day. If it's Tuesday when crossing, the date immediately becomes Wednesday. This is because traveling westward means moving towards earlier longitudes, and to maintain the correct calendar date globally, a day must be added.
The question asks to identify which region the International Date Line (IDL) does NOT pass through. To answer this, one needs to recall the geographical path of the IDL.
Correct Option: C) The International Date Line is located primarily in the Pacific Ocean, roughly following the 180° longitude. It extends north into the Arctic Ocean and south towards the Antarctic region. It is on the opposite side of the globe from the Indian Ocean.
The International Date Line (IDL) is an imaginary line on the surface of the Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. Understanding its function and relationship with Earth's rotation helps determine the time difference it represents.
B) 24 hours — The International Date Line represents a full 24-hour difference because it is the boundary where one calendar day ends and the next begins. Crossing it means either gaining or losing a full day.
The question asks for the primary reason why Kiribati moved the International Date Line (IDL) eastward in 1995. This is a geographical and historical fact related to time zones and international dating conventions. Understanding the purpose of the IDL and the geographical spread of Kiribati's islands is key to answering this question.
Correct Option: A) So that all its islands would share the same calendar date. This is the correct reason. By moving the International Date Line eastward, Kiribati ensured that all its islands, which are spread across a vast area of the Pacific, would operate on the same calendar day, eliminating the confusion and logistical difficulties caused by being on two different dates.
The question asks about the nature of the International Date Line (IDL). We need to evaluate each option based on geographical and international conventions related to time zones and date changes.
Correct Option: B) It is an imaginary line agreed upon by convention
The question asks when the concept of the International Date Line (IDL) became practically important. This requires understanding the historical context of global travel and timekeeping.
Correct Option: C) Magellan's circumnavigation of the Earth (16th century) is correct because his expedition was the first to experience and document the phenomenon of gaining or losing a day when traveling completely around the world, making the need for a consistent date line evident.