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UPSC Static Quiz – Geography : 19 September 2025

Kartavya Desk Staff

UPSC Static Quiz – Geography : 19 September 2025 We will post 5 questions daily on static topics mentioned in the UPSC civil services preliminary examination syllabus. Each week will focus on a specific topic from the syllabus, such as History of India and Indian National Movement, Indian and World Geography, and more.We are excited to bring you our daily UPSC Static Quiz, designed to help you prepare for the UPSC Civil Services Preliminary Examination. Each day, we will post 5 questions on static topics mentioned in the UPSC syllabus. This week, we are focusing on Indian and World Geography.

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Participating in daily quizzes helps reinforce your knowledge and identify areas that need improvement. Regular practice will enhance your recall abilities and boost your confidence for the examination. By covering various topics throughout the week, you ensure a comprehensive revision of the syllabus.

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• Question 1 of 5 1. Question Consider the following statements regarding ocean tides: The gravitational pull of the Moon is the primary force responsible for the creation of tides. Spring tides, characterized by the highest tidal range, occur when the Sun, Moon, and Earth are in a straight line. Neap tides, with the lowest tidal range, occur during the first and third quarter moon phases when the Sun and Moon are at a 90-degree angle to each other with respect to the Earth. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: C The gravitational pull of the Moon is the most significant factor influencing tides. Although the Sun is much larger than the Moon, the Moon is much closer to the Earth, so its gravitational effect on the tides is more than twice that of the Sun. Spring tides occur during the full moon and new moon phases when the Sun, Moon, and Earth are aligned (a condition known as syzygy). In this alignment, the gravitational forces of the Sun and Moon combine to produce the highest high tides and lowest low tides, resulting in the greatest tidal range. Conversely, neap tides occur when the Sun and Moon are at a right angle to each other relative to the Earth (during the first and third quarter moon). In this configuration, the gravitational pulls of the Sun and Moon partially cancel each other out, leading to the lowest high tides and highest low tides, and thus the smallest tidal range. Understanding these alignments and their effects on tidal ranges is crucial for coastal navigation, fishing, and engineering projects. Incorrect Solution: C The gravitational pull of the Moon is the most significant factor influencing tides. Although the Sun is much larger than the Moon, the Moon is much closer to the Earth, so its gravitational effect on the tides is more than twice that of the Sun. Spring tides occur during the full moon and new moon phases when the Sun, Moon, and Earth are aligned (a condition known as syzygy). In this alignment, the gravitational forces of the Sun and Moon combine to produce the highest high tides and lowest low tides, resulting in the greatest tidal range. Conversely, neap tides occur when the Sun and Moon are at a right angle to each other relative to the Earth (during the first and third quarter moon). In this configuration, the gravitational pulls of the Sun and Moon partially cancel each other out, leading to the lowest high tides and highest low tides, and thus the smallest tidal range. Understanding these alignments and their effects on tidal ranges is crucial for coastal navigation, fishing, and engineering projects.

#### 1. Question

Consider the following statements regarding ocean tides:

• The gravitational pull of the Moon is the primary force responsible for the creation of tides.

• Spring tides, characterized by the highest tidal range, occur when the Sun, Moon, and Earth are in a straight line.

• Neap tides, with the lowest tidal range, occur during the first and third quarter moon phases when the Sun and Moon are at a 90-degree angle to each other with respect to the Earth.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: C

• The gravitational pull of the Moon is the most significant factor influencing tides. Although the Sun is much larger than the Moon, the Moon is much closer to the Earth, so its gravitational effect on the tides is more than twice that of the Sun.

Spring tides occur during the full moon and new moon phases when the Sun, Moon, and Earth are aligned (a condition known as syzygy). In this alignment, the gravitational forces of the Sun and Moon combine to produce the highest high tides and lowest low tides, resulting in the greatest tidal range.

• Conversely, neap tides occur when the Sun and Moon are at a right angle to each other relative to the Earth (during the first and third quarter moon). In this configuration, the gravitational pulls of the Sun and Moon partially cancel each other out, leading to the lowest high tides and highest low tides, and thus the smallest tidal range.

• Understanding these alignments and their effects on tidal ranges is crucial for coastal navigation, fishing, and engineering projects.

Solution: C

• The gravitational pull of the Moon is the most significant factor influencing tides. Although the Sun is much larger than the Moon, the Moon is much closer to the Earth, so its gravitational effect on the tides is more than twice that of the Sun.

Spring tides occur during the full moon and new moon phases when the Sun, Moon, and Earth are aligned (a condition known as syzygy). In this alignment, the gravitational forces of the Sun and Moon combine to produce the highest high tides and lowest low tides, resulting in the greatest tidal range.

• Conversely, neap tides occur when the Sun and Moon are at a right angle to each other relative to the Earth (during the first and third quarter moon). In this configuration, the gravitational pulls of the Sun and Moon partially cancel each other out, leading to the lowest high tides and highest low tides, and thus the smallest tidal range.

• Understanding these alignments and their effects on tidal ranges is crucial for coastal navigation, fishing, and engineering projects.

• Question 2 of 5 2. Question With reference to the distribution of salinity in the oceans, consider the following statements: The highest salinity is generally found in the subtropical zones. In the equatorial regions, despite high temperatures and evaporation, salinity is lower than in the subtropical zones. The Baltic Sea has a very low salinity due to the large influx of freshwater from rivers and low evaporation rates. The Red Sea has one of the highest salinities in the world’s oceans. How many of the above statements are correct? (a) Only one (b) Only two (c) Only three (d) All four Correct Solution: D The highest salinity is found in the subtropical zones (around 20-30 degrees North and South latitudes) where evaporation rates are very high due to descending dry air, and precipitation is low. In the equatorial regions, although evaporation is high, it is counteracted by heavy rainfall, leading to a net input of freshwater and thus lower salinity compared to the subtropics. The Baltic Sea is a brackish inland sea with low salinity due to the significant inflow of freshwater from numerous rivers and restricted connection to the saltier North Sea. The Red Sea is a landlocked sea in a hot and arid region with very high evaporation rates and limited freshwater input, resulting in exceptionally high salinity. The interplay of evaporation, precipitation, river runoff, and the freezing and melting of sea ice are the primary factors controlling the surface salinity of the oceans. Incorrect Solution: D The highest salinity is found in the subtropical zones (around 20-30 degrees North and South latitudes) where evaporation rates are very high due to descending dry air, and precipitation is low. In the equatorial regions, although evaporation is high, it is counteracted by heavy rainfall, leading to a net input of freshwater and thus lower salinity compared to the subtropics. The Baltic Sea is a brackish inland sea with low salinity due to the significant inflow of freshwater from numerous rivers and restricted connection to the saltier North Sea. The Red Sea is a landlocked sea in a hot and arid region with very high evaporation rates and limited freshwater input, resulting in exceptionally high salinity. The interplay of evaporation, precipitation, river runoff, and the freezing and melting of sea ice are the primary factors controlling the surface salinity of the oceans.

#### 2. Question

With reference to the distribution of salinity in the oceans, consider the following statements:

• The highest salinity is generally found in the subtropical zones.

• In the equatorial regions, despite high temperatures and evaporation, salinity is lower than in the subtropical zones.

• The Baltic Sea has a very low salinity due to the large influx of freshwater from rivers and low evaporation rates.

• The Red Sea has one of the highest salinities in the world’s oceans.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) Only three

• (d) All four

Solution: D

• The highest salinity is found in the subtropical zones (around 20-30 degrees North and South latitudes) where evaporation rates are very high due to descending dry air, and precipitation is low. In the equatorial regions, although evaporation is high, it is counteracted by heavy rainfall, leading to a net input of freshwater and thus lower salinity compared to the subtropics.

• The Baltic Sea is a brackish inland sea with low salinity due to the significant inflow of freshwater from numerous rivers and restricted connection to the saltier North Sea.

• The Red Sea is a landlocked sea in a hot and arid region with very high evaporation rates and limited freshwater input, resulting in exceptionally high salinity. The interplay of evaporation, precipitation, river runoff, and the freezing and melting of sea ice are the primary factors controlling the surface salinity of the oceans.

Solution: D

• The highest salinity is found in the subtropical zones (around 20-30 degrees North and South latitudes) where evaporation rates are very high due to descending dry air, and precipitation is low. In the equatorial regions, although evaporation is high, it is counteracted by heavy rainfall, leading to a net input of freshwater and thus lower salinity compared to the subtropics.

• The Baltic Sea is a brackish inland sea with low salinity due to the significant inflow of freshwater from numerous rivers and restricted connection to the saltier North Sea.

• The Red Sea is a landlocked sea in a hot and arid region with very high evaporation rates and limited freshwater input, resulting in exceptionally high salinity. The interplay of evaporation, precipitation, river runoff, and the freezing and melting of sea ice are the primary factors controlling the surface salinity of the oceans.

• Question 3 of 5 3. Question Consider the following statements about ocean waves: The vertical distance between the crest and trough of a wave is called the wavelength. The speed of a wave is determined by its height. In deep water, the water particles in a wave move in a horizontal direction. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: D The vertical distance between the crest (highest point) and trough (lowest point) of a wave is called the wave height, not the wavelength. The wavelength is the horizontal distance between two consecutive crests or troughs. The speed of a wave in deep water is determined by its wavelength and wave period, not its height. Longer wavelength waves travel faster. The height of a wave is a measure of its energy. In deep water, the water particles in a wave move in a circular or orbital motion, not a horizontal one. As the wave passes, the water particles move up and forward with the crest and down and backward with the trough, returning to their approximate original position. This orbital motion decreases with depth and becomes negligible at a depth equal to about half the wavelength. The energy of the wave is transmitted through this orbital motion of water particles. Incorrect Solution: D The vertical distance between the crest (highest point) and trough (lowest point) of a wave is called the wave height, not the wavelength. The wavelength is the horizontal distance between two consecutive crests or troughs. The speed of a wave in deep water is determined by its wavelength and wave period, not its height. Longer wavelength waves travel faster. The height of a wave is a measure of its energy. In deep water, the water particles in a wave move in a circular or orbital motion, not a horizontal one. As the wave passes, the water particles move up and forward with the crest and down and backward with the trough, returning to their approximate original position. This orbital motion decreases with depth and becomes negligible at a depth equal to about half the wavelength. The energy of the wave is transmitted through this orbital motion of water particles.

#### 3. Question

Consider the following statements about ocean waves:

• The vertical distance between the crest and trough of a wave is called the wavelength.

• The speed of a wave is determined by its height.

• In deep water, the water particles in a wave move in a horizontal direction.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: D

• The vertical distance between the crest (highest point) and trough (lowest point) of a wave is called the wave height, not the wavelength. The wavelength is the horizontal distance between two consecutive crests or troughs.

• The speed of a wave in deep water is determined by its wavelength and wave period, not its height. Longer wavelength waves travel faster. The height of a wave is a measure of its energy. In deep water, the water particles in a wave move in a circular or orbital motion, not a horizontal one.

• As the wave passes, the water particles move up and forward with the crest and down and backward with the trough, returning to their approximate original position. This orbital motion decreases with depth and becomes negligible at a depth equal to about half the wavelength. The energy of the wave is transmitted through this orbital motion of water particles.

Solution: D

• The vertical distance between the crest (highest point) and trough (lowest point) of a wave is called the wave height, not the wavelength. The wavelength is the horizontal distance between two consecutive crests or troughs.

• The speed of a wave in deep water is determined by its wavelength and wave period, not its height. Longer wavelength waves travel faster. The height of a wave is a measure of its energy. In deep water, the water particles in a wave move in a circular or orbital motion, not a horizontal one.

• As the wave passes, the water particles move up and forward with the crest and down and backward with the trough, returning to their approximate original position. This orbital motion decreases with depth and becomes negligible at a depth equal to about half the wavelength. The energy of the wave is transmitted through this orbital motion of water particles.

• Question 4 of 5 4. Question Consider the following statements regarding ocean currents: The Coriolis effect causes ocean currents to be deflected to the left in the Northern Hemisphere and to the right in the Southern Hemisphere. Western boundary currents, such as the Gulf Stream, are typically slower, broader, and shallower than eastern boundary currents. Upwelling is a process in which cold, nutrient-rich water from the deep ocean rises to the surface, supporting high levels of biological productivity. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: A Only statement 3 is correct. Upwelling is a crucial oceanic process where deep, cold, and nutrient-rich water is brought to the surface. This process is often driven by winds blowing parallel to the coast, which, due to the Coriolis effect, pushes the surface water away from the coast, allowing the deeper water to rise and replace it. These upwelling zones, such as the one off the coast of Peru, are among the most productive fishing grounds in the world. Statement 1 is incorrect. The Coriolis effect deflects moving objects, including ocean currents, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is a fundamental concept in physical geography. Statement 2 is also incorrect. Western boundary currents (e.g., Gulf Stream, Kuroshio Current) are typically fast, narrow, and deep, while eastern boundary currents (e.g., California Current, Peru Current) are slower, broader, and shallower. This phenomenon is known as western intensification. Incorrect Solution: A Only statement 3 is correct. Upwelling is a crucial oceanic process where deep, cold, and nutrient-rich water is brought to the surface. This process is often driven by winds blowing parallel to the coast, which, due to the Coriolis effect, pushes the surface water away from the coast, allowing the deeper water to rise and replace it. These upwelling zones, such as the one off the coast of Peru, are among the most productive fishing grounds in the world. Statement 1 is incorrect. The Coriolis effect deflects moving objects, including ocean currents, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is a fundamental concept in physical geography. Statement 2 is also incorrect. Western boundary currents (e.g., Gulf Stream, Kuroshio Current) are typically fast, narrow, and deep, while eastern boundary currents (e.g., California Current, Peru Current) are slower, broader, and shallower. This phenomenon is known as western intensification.

#### 4. Question

Consider the following statements regarding ocean currents:

• The Coriolis effect causes ocean currents to be deflected to the left in the Northern Hemisphere and to the right in the Southern Hemisphere.

• Western boundary currents, such as the Gulf Stream, are typically slower, broader, and shallower than eastern boundary currents.

• Upwelling is a process in which cold, nutrient-rich water from the deep ocean rises to the surface, supporting high levels of biological productivity.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: A

Only statement 3 is correct. Upwelling is a crucial oceanic process where deep, cold, and nutrient-rich water is brought to the surface. This process is often driven by winds blowing parallel to the coast, which, due to the Coriolis effect, pushes the surface water away from the coast, allowing the deeper water to rise and replace it. These upwelling zones, such as the one off the coast of Peru, are among the most productive fishing grounds in the world.

Statement 1 is incorrect. The Coriolis effect deflects moving objects, including ocean currents, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is a fundamental concept in physical geography.

Statement 2 is also incorrect. Western boundary currents (e.g., Gulf Stream, Kuroshio Current) are typically fast, narrow, and deep, while eastern boundary currents (e.g., California Current, Peru Current) are slower, broader, and shallower. This phenomenon is known as western intensification.

Solution: A

Only statement 3 is correct. Upwelling is a crucial oceanic process where deep, cold, and nutrient-rich water is brought to the surface. This process is often driven by winds blowing parallel to the coast, which, due to the Coriolis effect, pushes the surface water away from the coast, allowing the deeper water to rise and replace it. These upwelling zones, such as the one off the coast of Peru, are among the most productive fishing grounds in the world.

Statement 1 is incorrect. The Coriolis effect deflects moving objects, including ocean currents, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is a fundamental concept in physical geography.

Statement 2 is also incorrect. Western boundary currents (e.g., Gulf Stream, Kuroshio Current) are typically fast, narrow, and deep, while eastern boundary currents (e.g., California Current, Peru Current) are slower, broader, and shallower. This phenomenon is known as western intensification.

• Question 5 of 5 5. Question Match the following ocean currents with their respective oceans: Ocean Current Ocean A. Agulhas Current 1. Atlantic Ocean B. Canary Current 2. Pacific Ocean C. Kuroshio Current 3. Indian Ocean Select the correct answer using the code given below: a) A-1, B-2, C-3 b) A-2, B-3, C-1 c) A-3, B-1, C-2 d) A-3, B-2, C-1 Correct Solution: C The Agulhas Current is a warm western boundary current of the southwest Indian Ocean. It flows down the east coast of Africa. The Canary Current is a cold eastern boundary current of the North Atlantic Ocean. It is a part of the North Atlantic Gyre and flows southwest along the coast of Northwest Africa. The Kuroshio Current, also known as the Japan Current, is a warm western boundary current of the North Pacific Ocean. It flows northeastward off the coast of Japan. Incorrect Solution: C The Agulhas Current is a warm western boundary current of the southwest Indian Ocean. It flows down the east coast of Africa. The Canary Current is a cold eastern boundary current of the North Atlantic Ocean. It is a part of the North Atlantic Gyre and flows southwest along the coast of Northwest Africa. The Kuroshio Current, also known as the Japan Current, is a warm western boundary current of the North Pacific Ocean. It flows northeastward off the coast of Japan.

#### 5. Question

Match the following ocean currents with their respective oceans:

Ocean Current | Ocean

A. Agulhas Current | 1. Atlantic Ocean

B. Canary Current | 2. Pacific Ocean

C. Kuroshio Current | 3. Indian Ocean

Select the correct answer using the code given below:

• a) A-1, B-2, C-3

• b) A-2, B-3, C-1

• c) A-3, B-1, C-2

• d) A-3, B-2, C-1

Solution: C

• The Agulhas Current is a warm western boundary current of the southwest Indian Ocean. It flows down the east coast of Africa.

• The Canary Current is a cold eastern boundary current of the North Atlantic Ocean. It is a part of the North Atlantic Gyre and flows southwest along the coast of Northwest Africa.

• The Kuroshio Current, also known as the Japan Current, is a warm western boundary current of the North Pacific Ocean. It flows northeastward off the coast of Japan.

Solution: C

• The Agulhas Current is a warm western boundary current of the southwest Indian Ocean. It flows down the east coast of Africa.

• The Canary Current is a cold eastern boundary current of the North Atlantic Ocean. It is a part of the North Atlantic Gyre and flows southwest along the coast of Northwest Africa.

• The Kuroshio Current, also known as the Japan Current, is a warm western boundary current of the North Pacific Ocean. It flows northeastward off the coast of Japan.

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