Question

The prime meridian is also called_ _ _ _ _ _ _
A. Greenwich line
B. International date line
C. Tropic of cancer
D. Indian standard time

Answer 1

Hint: Prime Meridian is in a geographic coordinate system where longitude is defined to be 0 °. A prime meridian and its anti-meridian (180th meridian in a 360 ° system forms a broad circle together.

Complete Answer:
The Prime Meridian is also called the Greenwich Line. Prime Meridian run through Greenwich because the first reason was that Greenwich had already been selected by The USA as the basis for its own national time zone scheme. The second was that 72 percent of the world's trade in the late 19th century relied on sea charts that used Greenwich as the Prime Meridian. The decision was based on the argument that the greatest number of individuals would gain from naming Greenwich as Longitude 0o. Therefore, the Greenwich Prime Meridian became the center of the world time

Unlike the equator, which is defined by the axis of rotation, a prime meridian for a body not tidally locked (or at least not synchronous) is essentially arbitrary. For celestial objects that are tidally locked (more accurately, synchronous), though, their prime meridians are determined by the face often inward of the orbit (a planet facing its star, or a moon facing its planet), just as equators are determined by rotation.

The right answer is option A (Greenwich Line).

Note: For Earth's prime meridian, numerous conventions have been used or promoted in different regions throughout history. The most commonly used modern meridian is the IERS Reference Meridian. It is derived from the Greenwich Meridian, which was chosen as an international standard in 1884, but varies slightly.