1. Which of the following oceanic trenches are located in Pacific Ocean?
- Manila Trench
- Mariana Trench
- South Sandwich Trench
- Sunda Trench
Select the correct answer using the codes given below:
[A] Only 1 & 2
[B] Only 1, 2 & 3
[C] Only 1, 2 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [1, 2, 3 & 4]
Notes:- The Manila Trench is an oceanic trench in the Pacific Ocean, located west of the islands of Luzon and Mindoro in the Philippines. The Manila Trench subduction zone is an active convergent plate margin between the South China Sea and the northern Philippines. It is an ocean-ocean boundaries subduction zone.
- The Mariana Trench or Marianas Trench is located in the western Pacific Ocean about 200 kilometres east of the Mariana Islands; it is the deepest oceanic trench on Earth.
- The South Sandwich Trench is a deep arcuate trench in the South Atlantic Ocean lying 100 kilometres (62 mi) to the east of the South Sandwich Islands. It is the deepest trench of the Southern Atlantic Ocean, and the second deepest of the Atlantic Ocean after the Puerto Rico Trench.
- The Sunda Trench, earlier known as and sometimes still indicated as the Java Trench, is an oceanic trench located in the Indian ocean near Sumatra, formed where the Australian-Capricorn plates subduct under a part of the Eurasian Plate.
2. Which of the following is/are examples of ocean-ocean convergent plate boundaries subduction zone?
- Aleutian zone
- Philippines zone
- Mid-Atlantic Ridge zone
- Juan de Fuca Ridge zone
Select the correct answer using the codes given below:
[A] Only 2
[B] Only 1
[C] Only 1 & 2
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: C [Only 1 & 2]
Notes:- The Aleutian subduction zoneis a convergent boundary between the North American Plate and the Pacific Plate, that extends from the Alaska Range to the Kamchatka Peninsula. Here, the Pacific Plate is being subducted underneath the North American Plate. The Aleutian subduction zone includes two prominent features, the Aleutian Arc and the Aleutian Trench. It is an ocean-ocean boundaries subduction zone.
- The Philippines is situated between the Philippine Sea and Eurasian plates, a boundary that is undergoing active subduction and collision. The primary subduction zones near the Philippines include the Manila Trench to the west and the Philippine Trench to the east. It is an ocean-ocean boundaries subduction zone.
- The Mid-Atlantic Ridge (MAR) is known as a mid-ocean ridge, an underwater mountain system formed by plate tectonics. the MAR developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates. In the North Atlantic, it separates the Eurasian and North American Plates; whereas in the South Atlantic, it separates the African and South American Plates.
- The Juan de Fuca Ridge is a mid-ocean spreading center and divergent plate boundary located off the coast of the Pacific Northwest region of North America. The ridge separates the Pacific Plate to the west and the Juan de Fuca Plate to the east.
3. Which of the following historical monuments in Ukraine marks the scene of possibly the largest shooting massacre during the Holocaust?
[A] The wooden tserkvas of the Carpathian region
[B] Babi Yar
[C] Dormition Cathedral
[D] The Freedom Square
Show Answer
Correct Answer: B [Babi Yar]
Notes:- The wooden tserkvas of the Carpathian region are situated in the Carpathian Mountain range in southeast Poland and western Ukraine. They are Orthodox and Greek Catholic
- The Assumption or Dormition Cathedral was the main Orthodox church of Kharkov, Russian Empire (present day Kharkiv, Ukraine). The cathedral stands on the University Hill by the bank of the Lopan River and dominates the entire downtown.
- Babi Yar, a ravine near Kyiv, was the scene of possibly the largest shooting massacre during the Holocaust.
- The Freedom Square is the main square of Kharkiv and an architectural landmark. It is the second largest city-center square in Europe and the ninths in the world.
