Question

exam lesson name: introduction to oceanography
exam number: 700793rr
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question 13 of 20 :
select the best answer for the question.

1. which method of determining salinity is least likely to be used by current oceanographers?

○ a. determining salinity based on measurements of the chloride ion
○ b. determining salinity based on satellite observations
○ c. determining salinity based on electrical conductivity of seawater using a ctd
○ d. determining salinity based on refraction of light
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Explanation:

To determine the least - used method for salinity by current oceanographers, we analyze each option:

• Option A: The chloride ion method (titration) was a traditional way and is still used in some cases, but not the least used.
• Option B: Satellite observations are a modern and increasingly used method for large - scale salinity mapping.
• Option C: CTD (Conductivity - Temperature - Depth) sensors that measure electrical conductivity (a key modern method for salinity as conductivity is related to salinity) are widely used.
• Option D: Determining salinity based on the refraction of light is not a commonly used method by current oceanographers. The refraction of light is more related to optical properties and not a primary method for salinity determination compared to the other three options.

Answer:

D. Determining salinity based on refraction of light