Question

20. Why do some countries have many time zones?21. What is the International Date Line?22. Mention two places where the International Date Line deviates from 180° longitude.23. What is a Great Circle?24. How is a Great Circle useful?25. Except for the Equator, other parallels of latitude are not Great Circles. Why?pls tell me i will them brainliest​

Answer 1

1. Time zones are based on the fact that it takes one hour for the earth to rotate 15 degrees on its axis. ... That means that large countries that span more than 30 degrees of longitude usually have different time zones.
2. The International Date Line serves as the "line of demarcation" between two consecutive calendar dates. ... The International Date Line, established in 1884, passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south line on the Earth.
3. Accordingly, Samoa, Tokelau, Wallis and Futuna, Fiji, Tonga, Tuvalu, and New Zealand's Kermadec Islands and Chatham Islands are all west of the IDL and have the same date. American Samoa, the Cook Islands, Niue, and French Polynesia are east of the IDL and one day behind. The IDL then bends southwest to return to 180°.
4. A great circle, also known as an orthodrome, of a sphere is the intersection of the sphere and a plane that passes through the center point of the sphere. A great circle is the largest circle that can be drawn on any given sphere.
5. Because other parallels of latitude do not lie on the plane passing through the center of Earth nor do they divide the earth into two equal halves,which only Equator does.Thus Equator is the only latitude which is a Great Circle.
7. mark it brainliest....