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Which of the following statements about ocean salinity is/are correct?
1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.
2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.
3. Wind also influences the salinity of an area by transferring water to other areas.
4. The ocean currents have a negligible role in affecting ocean salinity.
Select the correct answer using the codes below:
- a)1,2 and 3 only
- b)2, 3 and 4 only
- c)3 and 4 only
- d)1 and 3 only
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of the following statements about ocean salinity is/are correct...
Factors affecting ocean salinity are mentioned below
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(i) The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.
(ii) Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.
(iii) Wind also influences the salinity of an area by transferring water to other areas.
(iv) The ocean currents contribute to the salinity variations. Salinity, temperature and density of water are interrelated. Hence, any change in the temperature or density influences the salinity of an area.
Most Upvoted Answer
Which of the following statements about ocean salinity is/are correct...
The correct answer is option 'A': 1, 2, and 3 only.
Explanation:
1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.
- Evaporation is the process by which water is converted from a liquid to a gas (water vapor) and is one of the primary factors that contribute to the salinity of ocean water. When water evaporates, it leaves behind dissolved salts and minerals, increasing the salinity of the remaining water. On the other hand, precipitation, such as rain or snow, adds fresh water to the ocean, which decreases its salinity. Therefore, the salinity of the surface layer of oceans is influenced by the balance between evaporation and precipitation.
2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.
- In coastal regions, the freshwater flow from rivers can significantly affect the salinity of the surface layer of the ocean. Rivers carry freshwater, which has a lower salinity than seawater, into the ocean, reducing the overall salinity in these areas. In polar regions, the freezing and thawing of ice also play a crucial role in determining surface salinity. When seawater freezes, it forms ice, leaving behind the dissolved salts and increasing the salinity of the remaining water. Conversely, when the ice melts, it adds freshwater to the ocean, reducing salinity.
3. Wind also influences the salinity of an area by transferring water to other areas.
- Wind plays a role in the redistribution of water in the ocean, which can impact salinity. Wind-driven surface currents can transport water from one area to another, leading to changes in salinity. For example, wind-driven currents can cause upwelling, which brings deeper, colder, and more saline water to the surface, increasing salinity in that region. Conversely, winds can also cause surface water to move away from an area, resulting in a decrease in salinity.
4. The ocean currents have a negligible role in affecting ocean salinity.
- This statement is incorrect. Ocean currents play a significant role in affecting ocean salinity. Ocean currents transport water from one region to another, carrying with them the salinity of the water. For example, warm surface currents like the Gulf Stream carry warm, saline water from the tropics to higher latitudes, contributing to the salinity of those regions. Similarly, cold surface currents like the California Current transport cold, less saline water from higher latitudes to lower latitudes, affecting salinity in those areas.
Therefore, the correct statements about ocean salinity are 1, 2, and 3 only.
Explanation:
1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.
- Evaporation is the process by which water is converted from a liquid to a gas (water vapor) and is one of the primary factors that contribute to the salinity of ocean water. When water evaporates, it leaves behind dissolved salts and minerals, increasing the salinity of the remaining water. On the other hand, precipitation, such as rain or snow, adds fresh water to the ocean, which decreases its salinity. Therefore, the salinity of the surface layer of oceans is influenced by the balance between evaporation and precipitation.
2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.
- In coastal regions, the freshwater flow from rivers can significantly affect the salinity of the surface layer of the ocean. Rivers carry freshwater, which has a lower salinity than seawater, into the ocean, reducing the overall salinity in these areas. In polar regions, the freezing and thawing of ice also play a crucial role in determining surface salinity. When seawater freezes, it forms ice, leaving behind the dissolved salts and increasing the salinity of the remaining water. Conversely, when the ice melts, it adds freshwater to the ocean, reducing salinity.
3. Wind also influences the salinity of an area by transferring water to other areas.
- Wind plays a role in the redistribution of water in the ocean, which can impact salinity. Wind-driven surface currents can transport water from one area to another, leading to changes in salinity. For example, wind-driven currents can cause upwelling, which brings deeper, colder, and more saline water to the surface, increasing salinity in that region. Conversely, winds can also cause surface water to move away from an area, resulting in a decrease in salinity.
4. The ocean currents have a negligible role in affecting ocean salinity.
- This statement is incorrect. Ocean currents play a significant role in affecting ocean salinity. Ocean currents transport water from one region to another, carrying with them the salinity of the water. For example, warm surface currents like the Gulf Stream carry warm, saline water from the tropics to higher latitudes, contributing to the salinity of those regions. Similarly, cold surface currents like the California Current transport cold, less saline water from higher latitudes to lower latitudes, affecting salinity in those areas.
Therefore, the correct statements about ocean salinity are 1, 2, and 3 only.
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Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer?
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Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer?.
Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements about ocean salinity is/are correct? 1. The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.2. Surface salinity is greatly influenced in coastal regions by the freshwater flow from rivers, and in polar regions by the processes of freezing and thawing of ice.3. Wind also influences the salinity of an area by transferring water to other areas.4. The ocean currents have a negligible role in affecting ocean salinity.Select the correct answer using the codes below:a) 1,2 and 3 onlyb) 2, 3 and 4 onlyc) 3 and 4 onlyd) 1 and 3 onlyCorrect answer is option 'A'. Can you explain this answer?.
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