Ocean salinity and temperature
Telangana Open School (TOSS) · Class 12 · Geography
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Quick Quiz: Ocean salinity and temperature
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What is the average salinity of ocean water?
Which zone of the ocean has the most stable temperature?
Which of the following seas has above-normal salinity?
What is the primary source of salts in the ocean?
Sample Questions
Which factor causes ocean temperature to decrease from equator to poles?
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Latitude
Latitude affects the angle of sunlight, with vertical rays at the equator and slanting rays at poles, causing temperature variation.
What is the main salt in seawater?
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Sodium Chloride
Sodium chloride (NaCl) is the most abundant salt in seawater, making up about 77.8% of total dissolved salts.
Which zone experiences rapid temperature decrease with depth?
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Thermocline
The thermocline is the layer between 100–1000 meters where temperature drops rapidly with depth.
Which sea has very low salinity due to large freshwater inflow?
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Baltic Sea
The Baltic Sea has low salinity (3–15‰) due to large freshwater input from rivers and limited evaporation.
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