UPSC Static Quiz – Geography : 18 September 2024

UPSC Static Quiz – Geography : 18 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 Which of the following processes is mainly responsible for the formation of volcanoes at subduction zones? a) The collision of tectonic plates releases carbon dioxide that forms magma. b) The melting of the Earth's core causes magma to rise to the surface. c) Water released from rocks lowers the melting point of the overlying rock, forming magma. d) Earth's magnetic field draws magma toward the surface. Correct Solution: c) At subduction zones, when one tectonic plate plunges beneath another, the descending plate carries water-rich rocks deep into the Earth. The increasing pressure and temperature cause the rocks to release water, which in turn reduces the melting point of the overlying mantle, forming magma. This magma rises to the surface, often reawakening dormant volcanoes. This process is a key driver of volcanism in regions like the Pacific “Ring of Fire,” where many of the world’s most active volcanoes are found. Incorrect Solution: c) At subduction zones, when one tectonic plate plunges beneath another, the descending plate carries water-rich rocks deep into the Earth. The increasing pressure and temperature cause the rocks to release water, which in turn reduces the melting point of the overlying mantle, forming magma. This magma rises to the surface, often reawakening dormant volcanoes. This process is a key driver of volcanism in regions like the Pacific “Ring of Fire,” where many of the world’s most active volcanoes are found.

#### 1. Question

Which of the following processes is mainly responsible for the formation of volcanoes at subduction zones?

• a) The collision of tectonic plates releases carbon dioxide that forms magma.

• b) The melting of the Earth's core causes magma to rise to the surface.

• c) Water released from rocks lowers the melting point of the overlying rock, forming magma.

• d) Earth's magnetic field draws magma toward the surface.

Solution: c)

At subduction zones, when one tectonic plate plunges beneath another, the descending plate carries water-rich rocks deep into the Earth. The increasing pressure and temperature cause the rocks to release water, which in turn reduces the melting point of the overlying mantle, forming magma. This magma rises to the surface, often reawakening dormant volcanoes. This process is a key driver of volcanism in regions like the Pacific “Ring of Fire,” where many of the world’s most active volcanoes are found.

Solution: c)

• Question 2 of 5 2. Question Consider the following statements about volcano formation: All volcanoes are formed at tectonic plate boundaries. Subduction zones are where two tectonic plates move away from each other. Hotspot volcanism occurs only at plate boundaries. Which of the statements given above is/are correct? a) 1 only b) 2 only c) 3 only d) None of the above Correct Solution: d) All the statements are incorrect. While many volcanoes form at tectonic plate boundaries, not all do. Some form away from plate boundaries through hotspot volcanism, as seen in the Hawaiian Islands, making statement 1 incorrect. Subduction zones occur when one tectonic plate dives beneath another, not when plates move apart, making statement 2 incorrect. Lastly, hotspot volcanism occurs in the middle of tectonic plates, not exclusively at plate boundaries, making statement 3 incorrect. Incorrect Solution: d) All the statements are incorrect. While many volcanoes form at tectonic plate boundaries, not all do. Some form away from plate boundaries through hotspot volcanism, as seen in the Hawaiian Islands, making statement 1 incorrect. Subduction zones occur when one tectonic plate dives beneath another, not when plates move apart, making statement 2 incorrect. Lastly, hotspot volcanism occurs in the middle of tectonic plates, not exclusively at plate boundaries, making statement 3 incorrect.

#### 2. Question

Consider the following statements about volcano formation:

• All volcanoes are formed at tectonic plate boundaries.

• Subduction zones are where two tectonic plates move away from each other.

• Hotspot volcanism occurs only at plate boundaries.

Which of the statements given above is/are correct?

• d) None of the above

Solution: d)

All the statements are incorrect. While many volcanoes form at tectonic plate boundaries, not all do. Some form away from plate boundaries through hotspot volcanism, as seen in the Hawaiian Islands, making statement 1 incorrect.

Subduction zones occur when one tectonic plate dives beneath another, not when plates move apart, making statement 2 incorrect.

Lastly, hotspot volcanism occurs in the middle of tectonic plates, not exclusively at plate boundaries, making statement 3 incorrect.

Solution: d)

Subduction zones occur when one tectonic plate dives beneath another, not when plates move apart, making statement 2 incorrect.

Lastly, hotspot volcanism occurs in the middle of tectonic plates, not exclusively at plate boundaries, making statement 3 incorrect.

• Question 3 of 5 3. Question Consider the following statements about the Ring of Fire: The Ring of Fire forms a complete circle around the Pacific Ocean. A volcanic eruption in one part of the Ring of Fire can trigger eruptions elsewhere in the ring. The majority of the world’s active volcanoes are located along the Ring of Fire. Which of the statements given above is/are correct? a) 1 and 2 only b) 3 only c) 1 and 3 only d) 2 and 3 only Correct Solution: b) The Ring of Fire is not a complete circle but a horseshoe-shaped zone, making statement 1 incorrect. The volcanoes in this region are not geologically connected, meaning that an eruption in one part, such as Indonesia, cannot trigger eruptions in distant regions like Alaska or Yellowstone, making statement 2 incorrect. However, it is true that 75% of the world’s active volcanoes are located along the Ring of Fire, making statement 3 correct. This region is a hotspot for both volcanic and seismic activities due to the tectonic interactions in the Pacific region. Incorrect Solution: b) The Ring of Fire is not a complete circle but a horseshoe-shaped zone, making statement 1 incorrect. The volcanoes in this region are not geologically connected, meaning that an eruption in one part, such as Indonesia, cannot trigger eruptions in distant regions like Alaska or Yellowstone, making statement 2 incorrect. However, it is true that 75% of the world’s active volcanoes are located along the Ring of Fire, making statement 3 correct. This region is a hotspot for both volcanic and seismic activities due to the tectonic interactions in the Pacific region.

#### 3. Question

Consider the following statements about the Ring of Fire:

• The Ring of Fire forms a complete circle around the Pacific Ocean.

• A volcanic eruption in one part of the Ring of Fire can trigger eruptions elsewhere in the ring.

• The majority of the world’s active volcanoes are located along the Ring of Fire.

Which of the statements given above is/are correct?

• a) 1 and 2 only

• c) 1 and 3 only

• d) 2 and 3 only

Solution: b)

The Ring of Fire is not a complete circle but a horseshoe-shaped zone, making statement 1 incorrect. The volcanoes in this region are not geologically connected, meaning that an eruption in one part, such as Indonesia, cannot trigger eruptions in distant regions like Alaska or Yellowstone, making statement 2 incorrect. However, it is true that 75% of the world’s active volcanoes are located along the Ring of Fire, making statement 3 correct. This region is a hotspot for both volcanic and seismic activities due to the tectonic interactions in the Pacific region.

Solution: b)

• Question 4 of 5 4. Question Which of the following features is NOT associated with a convergent plate boundary? a) Mid-ocean ridges b) Ocean trenches c) Volcanic arcs d) Subduction zones Correct Solution: a) Mid-ocean ridges are formed at divergent plate boundaries, where tectonic plates are moving away from each other, causing magma to rise and create new oceanic crust. In contrast, features like volcanic arcs, ocean trenches, and subduction zones are typically found at convergent plate boundaries, where tectonic plates crash into each other. Subduction of one plate beneath another results in the formation of deep ocean trenches and volcanic activity along volcanic arcs. Incorrect Solution: a) Mid-ocean ridges are formed at divergent plate boundaries, where tectonic plates are moving away from each other, causing magma to rise and create new oceanic crust. In contrast, features like volcanic arcs, ocean trenches, and subduction zones are typically found at convergent plate boundaries, where tectonic plates crash into each other. Subduction of one plate beneath another results in the formation of deep ocean trenches and volcanic activity along volcanic arcs.

#### 4. Question

Which of the following features is NOT associated with a convergent plate boundary?

• a) Mid-ocean ridges

• b) Ocean trenches

• c) Volcanic arcs

• d) Subduction zones

Solution: a)

Mid-ocean ridges are formed at divergent plate boundaries, where tectonic plates are moving away from each other, causing magma to rise and create new oceanic crust. In contrast, features like volcanic arcs, ocean trenches, and subduction zones are typically found at convergent plate boundaries, where tectonic plates crash into each other. Subduction of one plate beneath another results in the formation of deep ocean trenches and volcanic activity along volcanic arcs.

Solution: a)

• Question 5 of 5 5. Question Consider the following statements regarding convergent plate boundaries: Convergent boundaries always result in the formation of volcanic islands. The Aleutian Islands are formed due to the subduction of the North American Plate beneath the Pacific Plate. Subduction at convergent boundaries can create deep ocean trenches. The Andes Mountains are a result of the subduction of the Nazca Plate beneath the South American Plate. Which of the statements given above are correct? a) 1 and 2 b) 3 and 4 c) 1 and 3 d) 2 and 4 Correct Solution: b) Convergent boundaries can create both volcanic islands and continental mountain ranges, but they do not always result in volcanic islands, making statement 1 incorrect. The Aleutian Islands are formed by the subduction of the Pacific Plate beneath the North American Plate, not the other way around, making statement 2 incorrect. Deep ocean trenches like the Aleutian Trench are created at subduction zones along convergent boundaries, making statement 3 correct. The Andes Mountains formed due to the subduction of the Nazca Plate beneath the South American Plate, making statement 4 correct. Incorrect Solution: b) Convergent boundaries can create both volcanic islands and continental mountain ranges, but they do not always result in volcanic islands, making statement 1 incorrect. The Aleutian Islands are formed by the subduction of the Pacific Plate beneath the North American Plate, not the other way around, making statement 2 incorrect. Deep ocean trenches like the Aleutian Trench are created at subduction zones along convergent boundaries, making statement 3 correct. The Andes Mountains formed due to the subduction of the Nazca Plate beneath the South American Plate, making statement 4 correct.

#### 5. Question

Consider the following statements regarding convergent plate boundaries:

• Convergent boundaries always result in the formation of volcanic islands.

• The Aleutian Islands are formed due to the subduction of the North American Plate beneath the Pacific Plate.

• Subduction at convergent boundaries can create deep ocean trenches.

• The Andes Mountains are a result of the subduction of the Nazca Plate beneath the South American Plate.

Which of the statements given above are correct?

• a) 1 and 2

• b) 3 and 4

• c) 1 and 3

• d) 2 and 4

Solution: b)

Convergent boundaries can create both volcanic islands and continental mountain ranges, but they do not always result in volcanic islands, making statement 1 incorrect.

The Aleutian Islands are formed by the subduction of the Pacific Plate beneath the North American Plate, not the other way around, making statement 2 incorrect.

Deep ocean trenches like the Aleutian Trench are created at subduction zones along convergent boundaries, making statement 3 correct.

The Andes Mountains formed due to the subduction of the Nazca Plate beneath the South American Plate, making statement 4 correct.

Solution: b)

Convergent boundaries can create both volcanic islands and continental mountain ranges, but they do not always result in volcanic islands, making statement 1 incorrect.

The Aleutian Islands are formed by the subduction of the Pacific Plate beneath the North American Plate, not the other way around, making statement 2 incorrect.

Deep ocean trenches like the Aleutian Trench are created at subduction zones along convergent boundaries, making statement 3 correct.

The Andes Mountains formed due to the subduction of the Nazca Plate beneath the South American Plate, making statement 4 correct.

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