Is the prime meridian a line of longitude or latitude? Earth Science Earth's Surface Location, Longitude, and Latitude 1 Answer Kate M. Apr 29, 2015 It is a line of longitude defined as 0 degrees. Answer link Related questions How do you find the latitude and longitude of a city? Explain how latitude and longitude are used? What is latitude? What is the prime meridian? What is the prime meridian? How do lines of latitude change as they get further from the equator? How do lines of longitude change as they get further from the prime meridian? How are longitude lines and time zones related? What are the tropic of capricorn and the tropic of cancer? What characterizes the area between the two tropics? See all questions in Location, Longitude, and Latitude Impact of this question 6135 views around the world You can reuse this answer Creative Commons License