Chapter 13 Earth as a System: Energy, Matter, and Life - Part 5
What physical-chemical phenomenon explains why deep oceanic waters maintain high dissolved oxygen concentrations despite...
Type: MCQ • Marks: 1
What physical-chemical phenomenon explains why deep oceanic waters maintain high dissolved oxygen concentrations despite being far removed from atmospheric gas exchange?
Options
A. Volcanic oxygen release
B. Photosynthesis in the abyssal zone
C. Rapid vertical wind mixing
D. Thermohaline circulation (ocean conveyor belt) transporting cold, dense, oxygen-rich polar surface waters downward into abyssal depths
Explanation
Thermohaline circulation sinks cold, high-latitude oxygenated surface waters, ventilating the global deep ocean basins.
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Class 9thScience (MCQ)
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