define and explain the usefulness as well as importance of the following: a) international date line b) globe c) Indian standard time
Answers
Answer:
a)The International Date Line is an imaginary line of demarcation on the surface of Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next is located halfway round the world from the prime meridian—the zero degrees longitude established in Greenwich, England, in 1852. The International Date Line functions as a “ line of demarcation ” separating two consecutive calendar dates. When you cross the date line, you become a time traveler of sortsWhen you cross the IDL, the day and date change. If you cross it traveling westward, the day goes forward by one, and the date increases by one. If you cross it traveling eastward, the opposite occurs.
b)globe represents Earth as if you were looking at it from outer space. A globe is a sphere that shows the relative sizes and shapes of Earth's land features and waters. In this section you will learn how maps and globes provide different types of information about Earth's surface.
c)it is important to adopt the local time of one central meridian of a country as the standard time for the country. Thus, we need a standard meridian for the country. In India 82 ½ °E longitude determines the standard time. This is known as the Indian Standard Time.
Answer:
1)The International Date Line (IDL) is an imaginary line of demarcation on the surface of Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. It passes through the middle of the Pacific Ocean, roughly following the 180° line of longitude but deviating to pass around some territories and island groups.
2)Indian Standard time (IST) is the time zone observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. In military and aviation time IST is designated E* ("Echo-Star").[1]
3)A globe is the only correct way to study the whole earth. It promotes visual accuracy. A globe is more accurate that a flat map as it mimics the earth's actual shape and can portray the continent's shape and distance between land masses.
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