Which line is at 0 degrees longitude called?

Which line is at 0 degrees longitude called?

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

Answer: (A)

The main idea here is understanding what 0 degrees longitude represents. The line at 0 degrees longitude is the Prime Meridian, the reference line from which all east-west measuring is done. It runs from the North Pole to the South Pole and passes through Greenwich Observatory in England, which is why it’s tied to Greenwich and often called the Greenwich Meridian. This line establishes longitude values, and by pairing it with the Prime Meridian you get a global coordinate system for location and time zones. The other options don’t fit because the Equator is the line of 0 degrees latitude, not longitude. The International Date Line lies at about 180 degrees longitude, opposite the Prime Meridian. The term Imaginary Date Line isn’t a standard geographic label.

The main idea here is understanding what 0 degrees longitude represents. The line at 0 degrees longitude is the Prime Meridian, the reference line from which all east-west measuring is done. It runs from the North Pole to the South Pole and passes through Greenwich Observatory in England, which is why it’s tied to Greenwich and often called the Greenwich Meridian. This line establishes longitude values, and by pairing it with the Prime Meridian you get a global coordinate system for location and time zones.

The other options don’t fit because the Equator is the line of 0 degrees latitude, not longitude. The International Date Line lies at about 180 degrees longitude, opposite the Prime Meridian. The term Imaginary Date Line isn’t a standard geographic label.