Final answer:
Longitude lines, also called meridians, connect the North and South Poles. The prime meridian sits at 0 degrees longitude and divides the earth into the Eastern and Western Hemispheres.
Step-by-step explanation:
Longitude lines, also called meridians, are lines that connect the North and South Poles. The prime meridian sits at 0 degrees longitude and divides the earth into the Eastern and Western Hemispheres. The lines east of the prime meridian are numbered from 1 to 180 degrees east (E), while the lines west of the prime meridian are numbered from 1 to 180 degrees west (W). The equator is the largest circle of latitude, dividing the earth into the Northern and Southern Hemispheres.