Question

What is a geoid ？ Explain in 100 words

Answer 1

a hypothetical solid figure whose surface corresponds to mean sea level and it's imagined extension under or over land areas

Answer 2

Geoid is the shape that the surface of the oceans would take under the influence of the earths gravity and rotation alone, in the absence of there influences such ad winds and tides. The surface is extended through the continents (such as with very narrow hypothetical canals)