Multiple choice

Which one of the following statements regarding El Nino is NOT true?

  1. It is an extension of Equatorial current towards the Western coast of South America

  2. It is an occasional warm current that leads to an increase of about 10o surface water temperature

  3. It develops as a temporary replacement of the usual cold Peruvian current

  4. It causes an increase in planktons which thrive in the cold Peruvian current
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

El Nino is a warm ocean current that temporarily replaces the cold Peruvian current, raising water temperatures by about 10°C. This warm current DECREASES plankton population since planktons thrive in cold nutrient-rich water. Therefore, statement D is NOT true because El Nino reduces planktons rather than increasing them.

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