Multiple choice

Mean sea level means

  1. the average depth of the sea-level in the pacific ocean

  2. the mean of the sea level in the pacific ocean

  3. the average level of the sea

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mean sea level is the average surface level of the ocean, calculated from tidal observations over a long period. It serves as the reference point (zero elevation) for measuring altitude and depth on Earth. Options A and B incorrectly specify the Pacific Ocean, which would be a regional measure, not the global standard.

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