UPSC Static Quiz – Geography : 11 July 2025

UPSC Static Quiz – Geography : 11 July 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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• Question 1 of 5 1. Question Consider the following statements about different types of volcanic eruptions: Hawaiian eruptions are characterized by effusive outpourings of low-viscosity basaltic lava, creating shield volcanoes. Plinian eruptions are highly explosive events involving viscous, gas-rich magma, producing tall eruption columns and widespread ash fall. Strombolian eruptions involve moderate bursts of lava, ash, and volcanic bombs, often occurring in a rhythmic or continuous fashion. How many of the above statements is/are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: C Volcanic eruptions are classified based on their explosivity, magma type, and eruptive style. Statement 1 is correct: Hawaiian eruptions are relatively gentle, effusive (lava flows freely) eruptions of fluid, low-viscosity basaltic lava. These eruptions build broad, gently sloping shield volcanoes (e.g., Mauna Loa, Kilauea). Statement 2 is correct: Plinian eruptions (named after Pliny the Younger, who described the eruption of Mount Vesuvius in 79 AD) are highly explosive and violent. They involve viscous, gas-rich (typically rhyolitic or dacitic) magma, which fragments explosively, creating tall eruption columns (reaching the stratosphere) and leading to widespread ash fall and potentially pyroclastic flows. Statement 3 is correct: Strombolian eruptions (named after Stromboli volcano in Italy) are characterized by moderate, intermittent bursts or fountains of incandescent lava, ash, and volcanic bombs. These eruptions are driven by the bursting of large gas bubbles at the vent and can be relatively continuous or rhythmic. Incorrect Solution: C Volcanic eruptions are classified based on their explosivity, magma type, and eruptive style. Statement 1 is correct: Hawaiian eruptions are relatively gentle, effusive (lava flows freely) eruptions of fluid, low-viscosity basaltic lava. These eruptions build broad, gently sloping shield volcanoes (e.g., Mauna Loa, Kilauea). Statement 2 is correct: Plinian eruptions (named after Pliny the Younger, who described the eruption of Mount Vesuvius in 79 AD) are highly explosive and violent. They involve viscous, gas-rich (typically rhyolitic or dacitic) magma, which fragments explosively, creating tall eruption columns (reaching the stratosphere) and leading to widespread ash fall and potentially pyroclastic flows. Statement 3 is correct: Strombolian eruptions (named after Stromboli volcano in Italy) are characterized by moderate, intermittent bursts or fountains of incandescent lava, ash, and volcanic bombs. These eruptions are driven by the bursting of large gas bubbles at the vent and can be relatively continuous or rhythmic.

#### 1. Question

Consider the following statements about different types of volcanic eruptions:

• Hawaiian eruptions are characterized by effusive outpourings of low-viscosity basaltic lava, creating shield volcanoes.

• Plinian eruptions are highly explosive events involving viscous, gas-rich magma, producing tall eruption columns and widespread ash fall.

• Strombolian eruptions involve moderate bursts of lava, ash, and volcanic bombs, often occurring in a rhythmic or continuous fashion.

How many of the above statements is/are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: C

Volcanic eruptions are classified based on their explosivity, magma type, and eruptive style.

• Statement 1 is correct: Hawaiian eruptions are relatively gentle, effusive (lava flows freely) eruptions of fluid, low-viscosity basaltic lava. These eruptions build broad, gently sloping shield volcanoes (e.g., Mauna Loa, Kilauea).

• Statement 2 is correct: Plinian eruptions (named after Pliny the Younger, who described the eruption of Mount Vesuvius in 79 AD) are highly explosive and violent. They involve viscous, gas-rich (typically rhyolitic or dacitic) magma, which fragments explosively, creating tall eruption columns (reaching the stratosphere) and leading to widespread ash fall and potentially pyroclastic flows.

• Statement 3 is correct: Strombolian eruptions (named after Stromboli volcano in Italy) are characterized by moderate, intermittent bursts or fountains of incandescent lava, ash, and volcanic bombs. These eruptions are driven by the bursting of large gas bubbles at the vent and can be relatively continuous or rhythmic.

Solution: C

Volcanic eruptions are classified based on their explosivity, magma type, and eruptive style.

• Question 2 of 5 2. Question With reference to the phenomenon of tides, consider the following statements: Spring tides occur when the Sun, Earth, and Moon are aligned, resulting in higher high tides and lower low tides. Neap tides occur when the Sun and Moon are at right angles to each other relative to the Earth, leading to a smaller tidal range. The gravitational pull of the Moon is the sole factor responsible for causing tides on Earth. Most coastal locations experience two high tides and two low tides of approximately equal height each lunar day. How many of the above statements is/are correct? (a) Only one (b) Only two (c) Only three (d) All four Correct Solution: C Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Statement 1 is correct: Spring tides occur during new moon and full moon phases, when the Sun, Earth, and Moon are in alignment (syzygy). The gravitational forces of the Sun and Moon combine, leading to higher than average high tides and lower than average low tides, thus a larger tidal range. Statement 2 is correct: Neap tides occur during the first and third quarter moon phases, when the Sun and Moon are at right angles (quadrature) to each other relative to the Earth. The gravitational forces of the Sun and Moon partially counteract each other, resulting in lower than average high tides and higher than average low tides, thus a smaller tidal range. Statement 3 is incorrect: While the Moon’s gravitational pull is the primary driver of tides (due to its proximity to Earth), the Sun’s gravitational pull also significantly influences tides, contributing to the variation between spring and neap tides. Centrifugal force due to Earth’s rotation also plays a role in creating the tidal bulge on the side of Earth opposite the Moon. Statement 4 is correct: Most coastal locations experience a semidiurnal tidal pattern, which means two high tides and two low tides each lunar day (approximately 24 hours and 50 minutes). These tides are generally of approximately equal height, though variations (diurnal inequality) can occur due to local bathymetry, coastline shape, and the declination of the Moon. Some areas experience diurnal tides (one high and one low per day) or mixed tides. Incorrect Solution: C Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Statement 1 is correct: Spring tides occur during new moon and full moon phases, when the Sun, Earth, and Moon are in alignment (syzygy). The gravitational forces of the Sun and Moon combine, leading to higher than average high tides and lower than average low tides, thus a larger tidal range. Statement 2 is correct: Neap tides occur during the first and third quarter moon phases, when the Sun and Moon are at right angles (quadrature) to each other relative to the Earth. The gravitational forces of the Sun and Moon partially counteract each other, resulting in lower than average high tides and higher than average low tides, thus a smaller tidal range. Statement 3 is incorrect: While the Moon’s gravitational pull is the primary driver of tides (due to its proximity to Earth), the Sun’s gravitational pull also significantly influences tides, contributing to the variation between spring and neap tides. Centrifugal force due to Earth’s rotation also plays a role in creating the tidal bulge on the side of Earth opposite the Moon. Statement 4 is correct: Most coastal locations experience a semidiurnal tidal pattern, which means two high tides and two low tides each lunar day (approximately 24 hours and 50 minutes). These tides are generally of approximately equal height, though variations (diurnal inequality) can occur due to local bathymetry, coastline shape, and the declination of the Moon. Some areas experience diurnal tides (one high and one low per day) or mixed tides.

#### 2. Question

With reference to the phenomenon of tides, consider the following statements:

• Spring tides occur when the Sun, Earth, and Moon are aligned, resulting in higher high tides and lower low tides.

• Neap tides occur when the Sun and Moon are at right angles to each other relative to the Earth, leading to a smaller tidal range.

• The gravitational pull of the Moon is the sole factor responsible for causing tides on Earth.

• Most coastal locations experience two high tides and two low tides of approximately equal height each lunar day.

How many of the above statements is/are correct?

• (a) Only one

• (b) Only two

• (c) Only three

• (d) All four

Solution: C

• Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

• Statement 1 is correct: Spring tides occur during new moon and full moon phases, when the Sun, Earth, and Moon are in alignment (syzygy). The gravitational forces of the Sun and Moon combine, leading to higher than average high tides and lower than average low tides, thus a larger tidal range.

• Statement 2 is correct: Neap tides occur during the first and third quarter moon phases, when the Sun and Moon are at right angles (quadrature) to each other relative to the Earth. The gravitational forces of the Sun and Moon partially counteract each other, resulting in lower than average high tides and higher than average low tides, thus a smaller tidal range.

• Statement 3 is incorrect: While the Moon’s gravitational pull is the primary driver of tides (due to its proximity to Earth), the Sun’s gravitational pull also significantly influences tides, contributing to the variation between spring and neap tides. Centrifugal force due to Earth’s rotation also plays a role in creating the tidal bulge on the side of Earth opposite the Moon.

• Statement 4 is correct: Most coastal locations experience a semidiurnal tidal pattern, which means two high tides and two low tides each lunar day (approximately 24 hours and 50 minutes). These tides are generally of approximately equal height, though variations (diurnal inequality) can occur due to local bathymetry, coastline shape, and the declination of the Moon. Some areas experience diurnal tides (one high and one low per day) or mixed tides.

Solution: C

• Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

• Question 3 of 5 3. Question Consider the following statements regarding the characteristics of different biomes: Tropical rainforests are characterized by high biodiversity, dense canopy, and nutrient-poor soils due to rapid leaching. Temperate grasslands (e.g., prairies, steppes) typically have fertile soils rich in organic matter and are dominated by grasses rather than trees. Deserts are defined solely by their high temperatures and complete absence of vegetation. Tundra biomes, found at high latitudes and altitudes, are treeless regions with permafrost and a short growing season. How many of the above statements is/are correct? (a) Only one (b) Only two (c) Only three (d) All four Correct Solution: C Biomes are large ecological areas on the Earth’s surface, with fauna and flora (animals and plants) adapting to their environment. Statement 1 is correct: Tropical rainforests are known for their extremely high biodiversity, a multi-layered dense canopy that blocks much sunlight from reaching the forest floor, and surprisingly nutrient-poor soils (oxisols/laterites). The rapid decomposition and uptake of nutrients, along with intense leaching by heavy rainfall, prevent the accumulation of a rich humus layer. Statement 2 is correct: Temperate grasslands (known as prairies in North America, steppes in Eurasia, pampas in South America) are characterized by deep, fertile soils (e.g., mollisols) rich in organic matter due to the seasonal decay of dense grass roots. They are dominated by grasses and herbaceous plants, with trees being scarce primarily due to insufficient rainfall, frequent fires, and grazing. Statement 3 is incorrect: Deserts are defined primarily by their aridity (low precipitation), not solely by high temperatures. There are cold deserts (e.g., Gobi Desert, Patagonian Desert) as well as hot deserts. While vegetation is sparse, deserts are not completely devoid of it; they support specialized, drought-tolerant plants (xerophytes) and animals. Statement 4 is correct: Tundra biomes are found in high-latitude regions (Arctic tundra) and high-altitude mountainous areas (alpine tundra). They are treeless (though dwarf shrubs may exist), characterized by a permanently frozen subsoil called permafrost, low temperatures, and a short growing season. Incorrect Solution: C Biomes are large ecological areas on the Earth’s surface, with fauna and flora (animals and plants) adapting to their environment. Statement 1 is correct: Tropical rainforests are known for their extremely high biodiversity, a multi-layered dense canopy that blocks much sunlight from reaching the forest floor, and surprisingly nutrient-poor soils (oxisols/laterites). The rapid decomposition and uptake of nutrients, along with intense leaching by heavy rainfall, prevent the accumulation of a rich humus layer. Statement 2 is correct: Temperate grasslands (known as prairies in North America, steppes in Eurasia, pampas in South America) are characterized by deep, fertile soils (e.g., mollisols) rich in organic matter due to the seasonal decay of dense grass roots. They are dominated by grasses and herbaceous plants, with trees being scarce primarily due to insufficient rainfall, frequent fires, and grazing. Statement 3 is incorrect: Deserts are defined primarily by their aridity (low precipitation), not solely by high temperatures. There are cold deserts (e.g., Gobi Desert, Patagonian Desert) as well as hot deserts. While vegetation is sparse, deserts are not completely devoid of it; they support specialized, drought-tolerant plants (xerophytes) and animals. Statement 4 is correct: Tundra biomes are found in high-latitude regions (Arctic tundra) and high-altitude mountainous areas (alpine tundra). They are treeless (though dwarf shrubs may exist), characterized by a permanently frozen subsoil called permafrost, low temperatures, and a short growing season.

#### 3. Question

Consider the following statements regarding the characteristics of different biomes:

• Tropical rainforests are characterized by high biodiversity, dense canopy, and nutrient-poor soils due to rapid leaching.

• Temperate grasslands (e.g., prairies, steppes) typically have fertile soils rich in organic matter and are dominated by grasses rather than trees.

• Deserts are defined solely by their high temperatures and complete absence of vegetation.

• Tundra biomes, found at high latitudes and altitudes, are treeless regions with permafrost and a short growing season.

How many of the above statements is/are correct?

• (a) Only one

• (b) Only two

• (c) Only three

• (d) All four

Solution: C

• Biomes are large ecological areas on the Earth’s surface, with fauna and flora (animals and plants) adapting to their environment.

• Statement 1 is correct: Tropical rainforests are known for their extremely high biodiversity, a multi-layered dense canopy that blocks much sunlight from reaching the forest floor, and surprisingly nutrient-poor soils (oxisols/laterites). The rapid decomposition and uptake of nutrients, along with intense leaching by heavy rainfall, prevent the accumulation of a rich humus layer.

• Statement 2 is correct: Temperate grasslands (known as prairies in North America, steppes in Eurasia, pampas in South America) are characterized by deep, fertile soils (e.g., mollisols) rich in organic matter due to the seasonal decay of dense grass roots. They are dominated by grasses and herbaceous plants, with trees being scarce primarily due to insufficient rainfall, frequent fires, and grazing.

• Statement 3 is incorrect: Deserts are defined primarily by their aridity (low precipitation), not solely by high temperatures. There are cold deserts (e.g., Gobi Desert, Patagonian Desert) as well as hot deserts. While vegetation is sparse, deserts are not completely devoid of it; they support specialized, drought-tolerant plants (xerophytes) and animals.

• Statement 4 is correct: Tundra biomes are found in high-latitude regions (Arctic tundra) and high-altitude mountainous areas (alpine tundra). They are treeless (though dwarf shrubs may exist), characterized by a permanently frozen subsoil called permafrost, low temperatures, and a short growing season.

Solution: C

• Biomes are large ecological areas on the Earth’s surface, with fauna and flora (animals and plants) adapting to their environment.

• Question 4 of 5 4. Question Consider the following statements regarding the formation of Ox-bow lakes: They are primarily formed by glacial erosion in mountainous regions. They represent the remnants of ancient, dried-up river deltas. They are typically found in the upper course of a river where vertical erosion is dominant. How many of the above statements is/are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: D Ox-bow lakes are U-shaped bodies of water that form when a wide meander from the main stem of a river is cut off, creating a free-standing body of water. Statement 1 is incorrect: Ox-bow lakes are formed by fluvial (river) processes, specifically the erosion and deposition associated with meandering rivers. Glacial erosion forms features like cirque lakes (tarns) or paternoster lakes, not ox-bow lakes. Statement 2 is incorrect: Ox-bow lakes are abandoned meander loops of a river. River deltas are landforms created by deposition of sediment carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. They are distinct features. Statement 3 is incorrect: Ox-bow lakes are characteristic features of the middle or lower course (mature or old stage) of a river, where the river flows over a flatter plain and lateral (sideways) erosion leading to meandering is more dominant than vertical (downward) erosion. The upper course is typically characterized by steep gradients, V-shaped valleys, and dominant vertical erosion. Incorrect Solution: D Ox-bow lakes are U-shaped bodies of water that form when a wide meander from the main stem of a river is cut off, creating a free-standing body of water. Statement 1 is incorrect: Ox-bow lakes are formed by fluvial (river) processes, specifically the erosion and deposition associated with meandering rivers. Glacial erosion forms features like cirque lakes (tarns) or paternoster lakes, not ox-bow lakes. Statement 2 is incorrect: Ox-bow lakes are abandoned meander loops of a river. River deltas are landforms created by deposition of sediment carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. They are distinct features. Statement 3 is incorrect: Ox-bow lakes are characteristic features of the middle or lower course (mature or old stage) of a river, where the river flows over a flatter plain and lateral (sideways) erosion leading to meandering is more dominant than vertical (downward) erosion. The upper course is typically characterized by steep gradients, V-shaped valleys, and dominant vertical erosion.

#### 4. Question

Consider the following statements regarding the formation of Ox-bow lakes:

• They are primarily formed by glacial erosion in mountainous regions.

• They represent the remnants of ancient, dried-up river deltas.

• They are typically found in the upper course of a river where vertical erosion is dominant.

How many of the above statements is/are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: D

• Ox-bow lakes are U-shaped bodies of water that form when a wide meander from the main stem of a river is cut off, creating a free-standing body of water.

• Statement 1 is incorrect: Ox-bow lakes are formed by fluvial (river) processes, specifically the erosion and deposition associated with meandering rivers. Glacial erosion forms features like cirque lakes (tarns) or paternoster lakes, not ox-bow lakes.

• Statement 2 is incorrect: Ox-bow lakes are abandoned meander loops of a river. River deltas are landforms created by deposition of sediment carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. They are distinct features.

• Statement 3 is incorrect: Ox-bow lakes are characteristic features of the middle or lower course (mature or old stage) of a river, where the river flows over a flatter plain and lateral (sideways) erosion leading to meandering is more dominant than vertical (downward) erosion. The upper course is typically characterized by steep gradients, V-shaped valleys, and dominant vertical erosion.

Solution: D

• Ox-bow lakes are U-shaped bodies of water that form when a wide meander from the main stem of a river is cut off, creating a free-standing body of water.

• Question 5 of 5 5. Question Consider the following statements regarding the composition of Earth’s atmosphere: Oxygen is the most abundant gas in the Earth’s atmosphere. Water vapour is uniformly distributed throughout the atmosphere up to the thermosphere. Methane has a shorter atmospheric lifetime than carbon dioxide but is a less potent greenhouse gas per molecule. How many of the above statements is/are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: D Statement 1 is incorrect: Nitrogen (approx. 78%) is the most abundant gas in the Earth’s atmosphere, not oxygen. Oxygen (approx. 21%) is the second most abundant and is indeed essential for respiration and combustion. Statement 2 is incorrect: Water vapour concentration is highly variable both spatially and temporally, and it is concentrated in the lower atmosphere (troposphere). Its amount decreases rapidly with altitude and is negligible in the upper layers like the thermosphere. Statement 3 is incorrect: Methane (CH4) has a shorter atmospheric lifetime (around 12 years) compared to carbon dioxide (CO2, which can persist for centuries). However, methane is a more potent greenhouse gas per molecule than CO2 over shorter time scales (e.g., 20 or 100 years), meaning it traps significantly more heat per unit mass. Incorrect Solution: D Statement 1 is incorrect: Nitrogen (approx. 78%) is the most abundant gas in the Earth’s atmosphere, not oxygen. Oxygen (approx. 21%) is the second most abundant and is indeed essential for respiration and combustion. Statement 2 is incorrect: Water vapour concentration is highly variable both spatially and temporally, and it is concentrated in the lower atmosphere (troposphere). Its amount decreases rapidly with altitude and is negligible in the upper layers like the thermosphere. Statement 3 is incorrect: Methane (CH4) has a shorter atmospheric lifetime (around 12 years) compared to carbon dioxide (CO2, which can persist for centuries). However, methane is a more potent greenhouse gas per molecule than CO2 over shorter time scales (e.g., 20 or 100 years), meaning it traps significantly more heat per unit mass.

#### 5. Question

Consider the following statements regarding the composition of Earth’s atmosphere:

• Oxygen is the most abundant gas in the Earth’s atmosphere.

• Water vapour is uniformly distributed throughout the atmosphere up to the thermosphere.

• Methane has a shorter atmospheric lifetime than carbon dioxide but is a less potent greenhouse gas per molecule.

How many of the above statements is/are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: D

• Statement 1 is incorrect: Nitrogen (approx. 78%) is the most abundant gas in the Earth’s atmosphere, not oxygen. Oxygen (approx. 21%) is the second most abundant and is indeed essential for respiration and combustion.

• Statement 2 is incorrect: Water vapour concentration is highly variable both spatially and temporally, and it is concentrated in the lower atmosphere (troposphere). Its amount decreases rapidly with altitude and is negligible in the upper layers like the thermosphere.

• Statement 3 is incorrect: Methane (CH4) has a shorter atmospheric lifetime (around 12 years) compared to carbon dioxide (CO2, which can persist for centuries). However, methane is a more potent greenhouse gas per molecule than CO2 over shorter time scales (e.g., 20 or 100 years), meaning it traps significantly more heat per unit mass.

Solution: D

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