2023 · Q2
Which of the following statements about volcanoes are correct?
- 1The strength of a volcano is measured by the Volcanic Explosive Index.
- 2Iceland and Philippines were created by volcanic activity.
- 3Volcanic soils are rich, deep and fertile and allow intensive agriculture to take place.
Select the correct answer using the code given below.
General KnowledgeGeography
- A1 and 2 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Explanation
Statement 1 is true: the Volcanic Explosivity Index (VEI, a 0-8 scale) is the standard measure of the explosiveness/strength of a volcanic eruption. Statement 2 is true in the loose sense used by the question: Iceland was built by volcanism along the Mid-Atlantic Ridge, and the Philippine archipelago is a volcanic island arc formed by subduction-zone volcanism. Statement 3 is true: volcanic (andic) soils are deep, mineral-rich and fertile, supporting intensive agriculture (e.g., Java, the Deccan). All three statements are correct.