Multiple choice

Directions: The following item consists of two statements, one labeled as 'Assertion (A)' and the other labeled as 'Reason (R)'. You are to examine these two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so, whether the reason is the correct explanation of the Assertion. Select your answer using the codes given below.

Assertion: Ocean salinity at the tropics is higher than the average water salinity of all the oceans. Reason: The evaporation rate is higher at the equator.

  1. Both Assertion and Reason are true and the reason correctly explains the assertion.

  2. Both Assertion and Reason are true but the reason does not explain the assertion.

  3. Assertion is true but Reason is false.

  4. Assertion is false but Reason is true.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The salinity of seawater is usually 35 parts per thousand in most marine areas. This salinity measurement is a total of all the salts that are dissolved in the water. Evaporation of ocean water and formation of sea ice both increase the salinity of the ocean. Ocean salinity decreases from equator towards poles. Reason is that the evaporation rate is high at the equator.  

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