Multiple choice

Consider the following statements: Salinity of water in the equatorial ocean decreases because

  1. large rivers like Amazon and Congo enter into the sea
  2. evaporation is less.
  3. waters from Arctic and Antarctic mix with waters of equator.
  4. of heavy rainfall.

Which of these statements are correct?

  1. 1 and 2

  2. 3 and 4

  3. 1 and 3

  4. 1 and 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Equatorial ocean salinity decreases primarily because: (1) large rivers like Amazon and Congo discharge tremendous freshwater volume, and (4) heavy rainfall directly dilutes surface waters. Statement 2 about evaporation is incorrect - evaporation is actually high in equatorial regions, which would increase salinity. Statement 3 about polar waters mixing is incorrect.

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