What is the term for the line at 0 degrees longitude?

What is the term for the line at 0 degrees longitude?

• A. Prime Meridian
• B. International Dateline
• C. Equator
• D. Tropic of Cancer

Answer: (A)

The line at 0 degrees longitude is the Prime Meridian. It runs from the North Pole to the South Pole and passes through Greenwich, England, serving as the starting point for measuring longitude east and west. This reference lets us split the globe into eastern and western hemispheres. The other lines are different kinds of references: the International Date Line is around 180 degrees longitude and marks calendar changes; the Equator is at 0 degrees latitude; the Tropic of Cancer is a latitude about 23.5 degrees north. So the Prime Meridian is the defining line for longitude.

The line at 0 degrees longitude is the Prime Meridian. It runs from the North Pole to the South Pole and passes through Greenwich, England, serving as the starting point for measuring longitude east and west. This reference lets us split the globe into eastern and western hemispheres. The other lines are different kinds of references: the International Date Line is around 180 degrees longitude and marks calendar changes; the Equator is at 0 degrees latitude; the Tropic of Cancer is a latitude about 23.5 degrees north. So the Prime Meridian is the defining line for longitude.