Question

difference between Equator and prime meridian

Answer 1

The Equator separates the Northern and Southern Hemispheres. TheEquator is at 0° latitude.

The Prime Meridian separates the Eastern and Western Hemispheres. The Prime Meridian runs through Greenwich, England and is at 0° longitude.

Answer 2

Equator is only Great circle among all the latitude 0 degree
Prime meridian is the great circle that runs from north to south 0 degree