Which is the saddest country in the world? Summary: Greenwich Meridian (Prime Meridian) The 0-degree line of longitude that passes through the Royal Observatory in Greenwich, England is the Greenwich Meridian. What is the other name of prime meridian? The prime meridian is the line of 0° longitude, the starting point for measuring distance both east and west around the Earth. The prime meridian, or 0 degrees longitude, and the International Date Line, 180 degrees longitude, divide the Earth into Eastern and Western hemispheres. What is the imaginary line that separates East and West? The lines circling the globe in a north-south direction are called lines of longitude (or meridians). They are used to measure distances north and south of the equator. The imaginary lines circling the globe in an east-west direction are called the lines of latitude (or parallels, as they are parallel to the equator). What terms is used for imaginary East-West horizontal lines on the earth? The lines running North to South are called “Meridians” or “lines of longitude” (Figure 2), while the lines running East to West are called “Parallels” or “lines of latitude” (Figure 3). What are the two names of lines that run east and west? It is measured with 180 imaginary lines that form circles around the Earth east-west, parallel to the Equator. Latitude is the measurement of distance north or south of the Equator. How many lines of latitude are there in total? Thus there are 181 parallels in all including the Equator. There are 90 parallels in the Northern Hemisphere, and 90 in the Southern Hemisphere. Parallels are drawn at the interval of 1˚. Parallels are marked from 0˚ to 90˚ degrees. The meridian passing through Greenwich is known as Prime Meridian. The links joining north pole and south pole are called meridians of longitude. Lines drawn east-west parallel to the equator are called latitudes. Parallels : The north or south angular distance of a place from the equator is called latitude. The locations on the Earth’s surface are determined by two reference lines known as latitude and longitude….What is the difference between Latitude and Longitude? Latitude What is the similarity and difference between lines of latitude and longitude? Lines of longitude are also called meridians. It divides the Earth into two equal halves. Lines of latitude, also called parallels are drawn from east to west.