Prime Meridian: The prime meridian is the line of longitude designated as 0 degrees and runs through Greenwich, England. It serves as the reference point for measuring all other longitudes.
Time Zones: Time zones are areas on Earth with the same standard time. They follow lines of longitude and help coordinate time across different regions.
Longitude Grid: The longitudinal grid is formed by intersecting lines of latitude and longitude, creating a network used for precise location identification on Earth's surface.