Horizon & MeridianDemonstrate an understanding of the terms:... horizon, meridian...
The Horizon is the furthest visible point of the Earth's surface from the observer's position.
An imaginary line intersecting the Pole to the observer's zenith.
It also refers to a specific imaginary line stretching between the poles of the Earth along points of longitude. For example the Greenwich Meridian which crosses the Greenwich Observatory in London.