UPSC Static Quiz – Geography : 24 September 2024

UPSC Static Quiz – Geography : 24 September 2024 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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• Question 1 of 5 1. Question What is the primary factor responsible for the formation of waves on the ocean surface? a) The gravitational pull of the Moon b) The movement of ocean currents c) The blowing of wind and transfer of energy through friction d) The temperature difference between ocean layers Correct Solution: c) Waves on the ocean surface are primarily formed by the wind. As wind blows over the surface of the water, it transfers energy through friction, creating waves. The size of the waves depends on three factors: wind speed, wind duration, and the fetch (the distance over which the wind blows uninterrupted). This energy transfer from wind to water results in waves of varying sizes. Incorrect Solution: c) Waves on the ocean surface are primarily formed by the wind. As wind blows over the surface of the water, it transfers energy through friction, creating waves. The size of the waves depends on three factors: wind speed, wind duration, and the fetch (the distance over which the wind blows uninterrupted). This energy transfer from wind to water results in waves of varying sizes.

#### 1. Question

What is the primary factor responsible for the formation of waves on the ocean surface?

• a) The gravitational pull of the Moon

• b) The movement of ocean currents

• c) The blowing of wind and transfer of energy through friction

• d) The temperature difference between ocean layers

Solution: c)

Waves on the ocean surface are primarily formed by the wind. As wind blows over the surface of the water, it transfers energy through friction, creating waves.

The size of the waves depends on three factors: wind speed, wind duration, and the fetch (the distance over which the wind blows uninterrupted). This energy transfer from wind to water results in waves of varying sizes.

Solution: c)

Waves on the ocean surface are primarily formed by the wind. As wind blows over the surface of the water, it transfers energy through friction, creating waves.

• Question 2 of 5 2. Question Which of the following statements is true about the size of ocean waves? a) The largest waves are usually found near coastal regions where the land meets the ocean. b) Waves can only form in shallow water close to the shoreline. c) Rogue waves are the result of normal oceanic wave patterns and are common in all oceans. d) The smallest category of waves is called ripples, which are less than one foot high. Correct Solution: d) Ripples are the smallest category of waves, generally growing to less than one foot (0.3 meters) in height. These small waves form due to mild wind blowing over the water’s surface. In contrast, the largest waves form in areas with vast open water (like the North Atlantic), where wind can blow over long distances (fetch). Rogue waves, which are rare and unpredictable, are usually formed during storms when ocean swells combine and reinforce each other. These waves can be massive, like the 84-foot Draupner wave recorded in the North Sea. Incorrect Solution: d) Ripples are the smallest category of waves, generally growing to less than one foot (0.3 meters) in height. These small waves form due to mild wind blowing over the water’s surface. In contrast, the largest waves form in areas with vast open water (like the North Atlantic), where wind can blow over long distances (fetch). Rogue waves, which are rare and unpredictable, are usually formed during storms when ocean swells combine and reinforce each other. These waves can be massive, like the 84-foot Draupner wave recorded in the North Sea.

#### 2. Question

Which of the following statements is true about the size of ocean waves?

• a) The largest waves are usually found near coastal regions where the land meets the ocean.

• b) Waves can only form in shallow water close to the shoreline.

• c) Rogue waves are the result of normal oceanic wave patterns and are common in all oceans.

• d) The smallest category of waves is called ripples, which are less than one foot high.

Solution: d)

Ripples are the smallest category of waves, generally growing to less than one foot (0.3 meters) in height. These small waves form due to mild wind blowing over the water’s surface.

In contrast, the largest waves form in areas with vast open water (like the North Atlantic), where wind can blow over long distances (fetch).

Rogue waves, which are rare and unpredictable, are usually formed during storms when ocean swells combine and reinforce each other. These waves can be massive, like the 84-foot Draupner wave recorded in the North Sea.

Solution: d)

Ripples are the smallest category of waves, generally growing to less than one foot (0.3 meters) in height. These small waves form due to mild wind blowing over the water’s surface.

In contrast, the largest waves form in areas with vast open water (like the North Atlantic), where wind can blow over long distances (fetch).

• Question 3 of 5 3. Question Consider the following statements about tsunami waves: Tsunami waves in the deep ocean are usually much higher than those near the shore. A tsunami is a single wave created by underwater disturbances like earthquakes. Tsunami waves can travel at speeds of hundreds of kilometers per hour in deep ocean waters. Which of the statements given above is/are correct? a) 1 only b) 3 only c) 2 and 3 only c) 2 and 3 only Correct Solution: b) Statement 1 is incorrect because tsunami waves in the deep ocean are typically only a few feet or meters high and are barely noticeable. Their height dramatically increases only when they reach shallow coastal waters. Statement 2 is incorrect. A tsunami is not a single wave but a series of waves, often called a wave train, generated by a disturbance such as an earthquake. Statement 3 is correct. Tsunami waves can travel at high speeds, often reaching 500 to 800 kilometers per hour in the deep ocean. Despite their speed, they are difficult to detect in deep waters due to their low height. Incorrect Solution: b) Statement 1 is incorrect because tsunami waves in the deep ocean are typically only a few feet or meters high and are barely noticeable. Their height dramatically increases only when they reach shallow coastal waters. Statement 2 is incorrect. A tsunami is not a single wave but a series of waves, often called a wave train, generated by a disturbance such as an earthquake. Statement 3 is correct. Tsunami waves can travel at high speeds, often reaching 500 to 800 kilometers per hour in the deep ocean. Despite their speed, they are difficult to detect in deep waters due to their low height.

#### 3. Question

Consider the following statements about tsunami waves:

• Tsunami waves in the deep ocean are usually much higher than those near the shore.

• A tsunami is a single wave created by underwater disturbances like earthquakes.

• Tsunami waves can travel at speeds of hundreds of kilometers per hour in deep ocean waters.

Which of the statements given above is/are correct?

• c) 2 and 3 only

Solution: b)

Statement 1 is incorrect because tsunami waves in the deep ocean are typically only a few feet or meters high and are barely noticeable. Their height dramatically increases only when they reach shallow coastal waters.

Statement 2 is incorrect. A tsunami is not a single wave but a series of waves, often called a wave train, generated by a disturbance such as an earthquake.

Statement 3 is correct. Tsunami waves can travel at high speeds, often reaching 500 to 800 kilometers per hour in the deep ocean. Despite their speed, they are difficult to detect in deep waters due to their low height.

Solution: b)

Statement 2 is incorrect. A tsunami is not a single wave but a series of waves, often called a wave train, generated by a disturbance such as an earthquake.

• Question 4 of 5 4. Question Consider the following statements regarding the impact of freshwater influx on ocean salinity: Freshwater influx from rivers and rainfall lowers ocean salinity in coastal regions. Freezing and thawing of ice in polar regions have no effect on ocean salinity. The surface salinity at river mouths such as the Amazon and Ganga is higher than the average ocean salinity. Which of the statements given above is/are correct? a) 1 only b) 1 and 2 only c) 2 and 3 only d) None of the above Correct Solution: a) Statement 1 is correct. Freshwater influx from rivers and rainfall dilutes the seawater, reducing its salinity, which is why salinity at river mouths like the Amazon and Ganga is lower than the ocean’s average. Statement 2 is incorrect. Freezing and thawing of ice in polar regions directly affect salinity. Freezing removes freshwater, increasing salinity, while thawing releases freshwater, lowering salinity. Statement 3 is incorrect. Surface salinity at river mouths is typically lower due to the influx of freshwater, not higher. Incorrect Solution: a) Statement 1 is correct. Freshwater influx from rivers and rainfall dilutes the seawater, reducing its salinity, which is why salinity at river mouths like the Amazon and Ganga is lower than the ocean’s average. Statement 2 is incorrect. Freezing and thawing of ice in polar regions directly affect salinity. Freezing removes freshwater, increasing salinity, while thawing releases freshwater, lowering salinity. Statement 3 is incorrect. Surface salinity at river mouths is typically lower due to the influx of freshwater, not higher.

#### 4. Question

Consider the following statements regarding the impact of freshwater influx on ocean salinity:

• Freshwater influx from rivers and rainfall lowers ocean salinity in coastal regions.

• Freezing and thawing of ice in polar regions have no effect on ocean salinity.

• The surface salinity at river mouths such as the Amazon and Ganga is higher than the average ocean salinity.

Which of the statements given above is/are correct?

• b) 1 and 2 only

• c) 2 and 3 only

• d) None of the above

Solution: a)

Statement 1 is correct. Freshwater influx from rivers and rainfall dilutes the seawater, reducing its salinity, which is why salinity at river mouths like the Amazon and Ganga is lower than the ocean’s average.

Statement 2 is incorrect. Freezing and thawing of ice in polar regions directly affect salinity. Freezing removes freshwater, increasing salinity, while thawing releases freshwater, lowering salinity.

Statement 3 is incorrect. Surface salinity at river mouths is typically lower due to the influx of freshwater, not higher.

Solution: a)

Statement 3 is incorrect. Surface salinity at river mouths is typically lower due to the influx of freshwater, not higher.

• Question 5 of 5 5. Question Which of the following correctly describes the impact of tides on the intertidal zone of a marine ecosystem? a) Tides have no effect on the organisms in the intertidal zone. b) Tides submerge and expose the intertidal zone, requiring organisms to adapt to both underwater and dry conditions. c) The intertidal zone remains permanently underwater regardless of tidal activity. d) Tides reduce biodiversity in the intertidal zone by limiting the availability of food. Correct Solution: b) Tides play a critical role in shaping the intertidal zone, an area between high and low tide. Organisms in this zone, such as plants and animals, must adapt to alternating conditions—being submerged during high tide and exposed to air and sunlight during low tide. This unique environment requires specific adaptations for survival, such as anchoring to rocks or burrowing in the sand. Incorrect Solution: b) Tides play a critical role in shaping the intertidal zone, an area between high and low tide. Organisms in this zone, such as plants and animals, must adapt to alternating conditions—being submerged during high tide and exposed to air and sunlight during low tide. This unique environment requires specific adaptations for survival, such as anchoring to rocks or burrowing in the sand.

#### 5. Question

Which of the following correctly describes the impact of tides on the intertidal zone of a marine ecosystem?

• a) Tides have no effect on the organisms in the intertidal zone.

• b) Tides submerge and expose the intertidal zone, requiring organisms to adapt to both underwater and dry conditions.

• c) The intertidal zone remains permanently underwater regardless of tidal activity.

• d) Tides reduce biodiversity in the intertidal zone by limiting the availability of food.

Solution: b)

Tides play a critical role in shaping the intertidal zone, an area between high and low tide. Organisms in this zone, such as plants and animals, must adapt to alternating conditions—being submerged during high tide and exposed to air and sunlight during low tide. This unique environment requires specific adaptations for survival, such as anchoring to rocks or burrowing in the sand.

Solution: b)

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