10 Questions MCQ Test Geography for UPSC CSE - Test: Water (Oceans)
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Detailed Solution for Test: Water (Oceans) - Question 3
Salinity is the saltiness or dissolved salt content of a body of water. It is a general term that is used to describe the levels of different salts, such as sodium chloride, magnesium and calcium sulfates and bicarbonates.
The salinity increases with depth and there is a distinct zone called
Detailed Solution for Test: Water (Oceans) - Question 5
Salinity, generally, increases with depth and there is a distinct zone called the halocline, where salinity increases sharply. Other factors being constant, increasing salinity of seawater causes its density to increase.
Detailed Solution for Test: Water (Oceans) - Question 9
Arctic Ocean is the smallest ocean in the world. It is located within the Arctic Circle and surrounds the North Pole. It is the shallowest and smallest of all the oceans in the planet, more than five times smaller than the Atlantic and Indian oceans. Its surface area is approximately 14.056 million square km, making it the smallest ocean on the planet.
Which one of the following is not a minor relief feature in the oceans:
Detailed Solution for Test: Water (Oceans) - Question 10
The correct answer is C: Oceanic Deep. An oceanic deep, also known as a trench, is a steep-sided, narrow basin that is located at the base of continental slopes and along island arcs. It is associated with active volcanoes and strong earthquakes, making it a very significant feature in the study of plate movements. It is much deeper than the surrounding ocean floor, which is usually 3-5 km deep. Seamounts, Atolls, and Guyots, on the other hand, are all minor relief features of the ocean floor. Seamounts are mountains with pointed summits that rise from the seafloor but do not reach the surface of the ocean. Atolls are low islands consisting of coral reefs surrounding a central depression. Guyots are flat-topped seamounts that have been eroded by waves.
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