Daily Quiz-390

Q1. Consider the following statements regarding the Circum-Pacific Zone:

1. It accounts for nearly 75% of the world’s active volcanoes.

2. It is primarily associated with divergent plate boundaries.

3. It records about 90% of global earthquakes.

Which of the statements given above is/are correct?

(a) 1 and 2 only

(b) 1 and 3 only

(c) 2 and 3 only

(d) 1, 2 and 3

Q2. The Wadati–Benioff Zone is associated with:

(a) Divergent plate boundaries and mid-ocean ridges

(b) Transform faults and shallow earthquakes

(c) Subduction zones and deep-focus earthquakes

(d) Hotspot volcanism

Q3. Which of the following trenches is correctly matched with its tectonic setting?

1. Mariana Trench – Subduction of the Pacific Plate

2. Peru-Chile Trench – Subduction of the Nazca Plate

3. Java Trench – Divergent plate boundary

Select the correct answer using the code below:

(a) 1 and 2 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Q4. Which of the following regions is part of the Circum-Pacific Belt?

1. Japan

2. Indonesia

3. Chile

4. Iceland

Select the correct answer using the code below:

(a) 1, 2 and 3 only

(b) 1 and 4 only

(c) 2 and 3 only

(d) 1, 2, 3 and 4

Q5. With reference to the Circum-Pacific Zone, consider the following features:

1. Stratovolcanoes with explosive eruptions

2. Andesitic lava composition

3. Formation of young fold mountains

4. Stable cratonic shields

Which of the above are characteristic of this zone?

(a) 1, 2 and 3 only

(b) 1 and 4 only

(c) 2, 3 and 4 only

(d) 1, 2, 3 and 4

Answers

1. (b) 1 and 3 only

Explanation: The Ring of Fire is mainly associated with convergent (subduction) boundaries, not divergent ones.

2. (c) Subduction zones and deep-focus earthquakes

Explanation: The Wadati–Benioff Zone refers to the inclined plane of earthquake foci along a subducting slab.

3. (a) 1 and 2 only

Explanation: The Java Trench is also a subduction zone (Indo-Australian Plate beneath Eurasian Plate), not a divergent boundary.

4. (a) 1, 2 and 3 only

Explanation: Iceland lies along the Mid-Atlantic Ridge (divergent boundary), not in the Ring of Fire.

5. (a) 1, 2 and 3 only

Explanation: The Ring of Fire is tectonically active and unstable; stable cratonic shields are not characteristic of it.