# How level is sea level?

In collaboration with John S. Shelton A discussion of sea level, what it is, how it is determined and factors that influence sea level at various locations on the earth Summary Illustrates the constant changes created by waves and tides, and provides data for the investigation of the question, how level is sea level. Points out that mean sea level is not the same for all the oceans.

- Kind: Educational
- Year: 1970
- Runtime: 11 min
- By: Shelton, John S, Encyclopaedia Britannica Educational Corporation
- Genres: Education, Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/howlevelissealevel)
- Licence or status: none stated by the archive
- Who can watch: Kids profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/howlevelissealevel?play=1)