RAS question
The Ring of Fire refers to:
Correct answer: (D) A horseshoe-shaped zone of earthquakes and volcanoes around the Pacific Ocean.
The Ring of Fire is a horseshoe-shaped zone of earthquakes and volcanoes around the edges of the Pacific Ocean.
Explanation
The Ring of Fire, also called the Circum-Pacific Belt, is not a literal ring but a horseshoe-shaped zone around the Pacific Ocean. NOAA Ocean Exploration describes it as a string of underwater volcanoes and earthquake sites along the Pacific's edges, stretching for nearly 40,250 kilometres. Its exam-relevant scale is about 75% of the world's active volcanoes and 90% of earthquakes occur in this belt. Its cause is plate tectonics, especially subduction at convergent plate boundaries, where one tectonic plate is pushed beneath another. That process generates magma and volcanic activity, while scraping and bending plates also produce earthquakes.
Why the other options are wrong
- (A) Amazon wildfires are forest-fire events, whereas the Ring of Fire is a tectonic belt of volcanoes and earthquake sites around the Pacific Ocean.
- (B) The Sahara Desert's border is a desert-margin idea and has no link with the Pacific plate-boundary zone described as the Ring of Fire.
- (C) Hot springs around Iceland do not define the Ring of Fire, which NOAA Ocean Exploration places around the edges of the Pacific Ocean rather than around Iceland.
Concept
This tests plate tectonics, especially subduction zones, volcanic belts and earthquake distribution. It recurs in RAS because world physical geography often asks candidates to connect landforms and hazards with plate-boundary processes.