Longitude lines are best described as lines that run north-south and are measured East and West of the Prime Meridian.

Longitude lines are best described as lines that run north-south and are measured East and West of the Prime Meridian.

• A. Lines that run east-west and are measured north and south of the equator.
• B. Lines that run north-south and are measured East and West of the Prime Meridian.
• C. Circles around the globe parallel to the equator.
• D. Measurements of distance on the map between meridians.

Answer: (B)

Longitude lines define how far east or west a place is from the Prime Meridian, and they run from the North Pole to the South Pole. They’re measured in degrees east or west of Greenwich (the Prime Meridian), with 0° at the Prime Meridian and up to 180° in either direction. That’s why this description fits exactly: the lines run north–south and their position is given by how far east or west you are from the Prime Meridian. The other ideas describe latitude: lines that run east–west and stretch around the globe at constant distance north or south of the equator. Those are not longitude lines, and they’re parallel to each other rather than converging at the poles. Also, longitude lines themselves are the geographical lines that embody those east–west measurements, not merely a separate distance measurement between meridians.

Longitude lines define how far east or west a place is from the Prime Meridian, and they run from the North Pole to the South Pole. They’re measured in degrees east or west of Greenwich (the Prime Meridian), with 0° at the Prime Meridian and up to 180° in either direction. That’s why this description fits exactly: the lines run north–south and their position is given by how far east or west you are from the Prime Meridian.

The other ideas describe latitude: lines that run east–west and stretch around the globe at constant distance north or south of the equator. Those are not longitude lines, and they’re parallel to each other rather than converging at the poles. Also, longitude lines themselves are the geographical lines that embody those east–west measurements, not merely a separate distance measurement between meridians.