Question

3 the salinity of seawater varies in different parts of the ocean as shown in the sea surface salinity model. which of the following statements is supported by the model? a. the equator has the highest concentration of salt. b. the mediterranean ocean, located approximately 35°n and 40°e, has a concentration of salt ranging from 37 pss to 39 pss. c. the salinity of the sea is greater at 60°n compared to 60°s. d. the gulf of mexico, located approximately 25°n and 90°w, has salinity only ranging from 30 pss to 33 pss. 4 propose an explanation as to why the red sea, persian gulf, and mediterranean ocean have the highest concentration of salt.

Explanation:

Step1: Analyze option A

By observing the map, the equator does not have the highest - salinity areas.

Step2: Analyze option B

Locate the Mediterranean Ocean on the map (around 35°N and 40°E). The color - coded salinity indicates that its salinity ranges from 37 pss to 39 pss.

Step3: Analyze option C

Compare 60°N and 60°S on the map. The salinity at 60°S is higher than at 60°N.

Step4: Analyze option D

Locate the Gulf of Mexico (around 25°N and 90°W) on the map. Its salinity is not in the range of 30 - 33 pss but higher.

for question 4:

Step1: Evaporation - precipitation balance

These regions (Red Sea, Persian Gulf, Mediterranean Ocean) have high evaporation rates due to warm climates and relatively low precipitation. Evaporation removes water, leaving salt behind, thus increasing salinity.

Step2: Limited water exchange

They have limited connections with the open ocean. For example, the Red Sea has a narrow connection with the Indian Ocean through the Bab - el - Mandeb Strait, and the Mediterranean has a narrow connection with the Atlantic through the Strait of Gibraltar. This limits the inflow of less - saline ocean water to dilute the salt.

Answer:

B. The Mediterranean Ocean, located approximately 35°N and 40°E, has a concentration of salt ranging from 37 pss to 39 pss.