What is the Earth's 0-degree longitudinal line called?

• A. Equator
• B. Prime Meridian
• C. International Date Line
• D. Greenwich Mean Line

Answer: (B)

The Earth's 0-degree longitudinal line is referred to as the Prime Meridian. This line is significant because it serves as the starting point for measuring longitude, which is expressed in degrees east or west of this line. The Prime Meridian runs through Greenwich, England, and is essential for establishing time zones and geographic coordinates across the globe.

Understanding the Prime Meridian is crucial for navigation and mapping, as it helps to create a framework for understanding how locations are positioned relative to one another along the Earth's surface. While the Equator is the 0-degree latitude line and divides the Earth into the Northern and Southern Hemispheres, the Prime Meridian specifically pertains to longitude and is vital for global positioning systems and geographic orientation.