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Test: Ocean Acidification - UPSC MCQ


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10 Questions MCQ Test - Test: Ocean Acidification

Test: Ocean Acidification for UPSC 2024 is part of UPSC preparation. The Test: Ocean Acidification questions and answers have been prepared according to the UPSC exam syllabus.The Test: Ocean Acidification MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Ocean Acidification below.
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Test: Ocean Acidification - Question 1
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What is the primary cause of ocean acidification?

Detailed Solution for Test: Ocean Acidification - Question 1
The primary cause of ocean acidification, as mentioned in the text, is the burning of fossil fuels. This releases carbon dioxide (CO2) into the atmosphere, which is then absorbed by the oceans, leading to a decrease in pH and increased acidity.
Test: Ocean Acidification - Question 2
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What is the term used to describe the level below which calcium carbonate minerals undergo dissolution in the ocean?

Detailed Solution for Test: Ocean Acidification - Question 2

The decrease in saturation state with depth leads to the so-called “saturation horizon,” below which the saturation state falls below 1 and calcium carbonate minerals dissolve. Aragonite and calcite have different saturation horizons, with aragonite dissolving at a shallower depth.

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Test: Ocean Acidification - Question 3
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Which form of calcium carbonate is relatively less soluble and found in planktonic algae shells, some corals, and mollusks?

Detailed Solution for Test: Ocean Acidification - Question 3
Calcite is the form of calcium carbonate that is relatively less soluble and is found in planktonic algae shells, some corals, and mollusks, as mentioned in the text.
Test: Ocean Acidification - Question 4
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How does ocean acidification affect the availability of carbonate ions in seawater?
Detailed Solution for Test: Ocean Acidification - Question 4
Ocean acidification decreases the availability of carbonate ions in seawater, as mentioned in the text. This can have detrimental effects on marine organisms that rely on carbonate ions to build their shells and skeletons.
Test: Ocean Acidification - Question 5
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What is the process by which CO2 reacts with seawater to form carbonic acid and release hydrogen ions?
Detailed Solution for Test: Ocean Acidification - Question 5
The process by which CO2 reacts with seawater to form carbonic acid and release hydrogen ions is called "carbonation." This process contributes to ocean acidification.
Test: Ocean Acidification - Question 6
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Which marine organisms may benefit from higher CO2 levels and rising acidity?
Detailed Solution for Test: Ocean Acidification - Question 6
Some marine phytoplankton species may benefit from higher CO2 levels and rising acidity, as mentioned in the text. However, this is not a universal trend, and the effects can vary among different organisms.
Test: Ocean Acidification - Question 7
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What is the long-term balance maintained on Earth between the uptake and release of CO2?
Detailed Solution for Test: Ocean Acidification - Question 7
The long-term balance maintained on Earth between the uptake and release of CO2 is referred to as "carbon cycling," as mentioned in the text. This involves processes like plant uptake, rock weathering, and volcanic emissions.
Test: Ocean Acidification - Question 8
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How does ocean acidification affect the saturation horizon in the ocean?
Detailed Solution for Test: Ocean Acidification - Question 8
Ocean acidification shallows the saturation horizon in the ocean, as mentioned in the text. This can expose more marine organisms to under-saturated conditions, potentially leading to the dissolution of their shells and skeletons.
Test: Ocean Acidification - Question 9
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What is the primary method mentioned in the text to mitigate ocean acidification?
Detailed Solution for Test: Ocean Acidification - Question 9
The primary method mentioned in the text to mitigate ocean acidification is reducing CO2 emissions, as this addresses the root cause of the problem.
Test: Ocean Acidification - Question 10
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What is the term used to describe the depth at which all carbonate is dissolved in the ocean?
Detailed Solution for Test: Ocean Acidification - Question 10
The term used to describe the depth at which all carbonate is dissolved in the ocean is "compensation depth," as mentioned in the text. This depth is critical in understanding the long-term fate of carbon in the ocean system.
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