Multiple choice general knowledge science & technology

The average salinity of sea water is

  1. 3%

  2. 3.5%

  3. 2.5%

  4. 2%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The average salinity of seawater is 3.5% (35 parts per thousand). This is a standard oceanographic fact. Salinity varies slightly by region (higher in enclosed seas, lower near river mouths), but 3.5% is the accepted global average.

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