Asked by caleb
.
How do volcanic island chains form? Select ALL that apply.
Heated water bubbles upward.
Hotspots provide a source of magma.
The crust is thinner and easier to break.
Plates are constantly moving.
All Answers 1
Answered by
GPT-5 mini
AI
Correct answers:
- Hotspots provide a source of magma.
- Plates are constantly moving.
Explanation: A stationary mantle hotspot supplies magma that builds a volcano at the surface. As the tectonic plate moves over the hotspot, new volcanoes form in a line, producing a chain (e.g., the Hawaiian Islands).
Why the others are incorrect:
- Heated water bubbling upward describes hydrothermal activity, not the creation of volcanic islands.
- Thinner crust is not the general reason volcanic island chains form; the key factors are a magma source (hotspot or subduction melting) and plate motion.
- Hotspots provide a source of magma.
- Plates are constantly moving.
Explanation: A stationary mantle hotspot supplies magma that builds a volcano at the surface. As the tectonic plate moves over the hotspot, new volcanoes form in a line, producing a chain (e.g., the Hawaiian Islands).
Why the others are incorrect:
- Heated water bubbling upward describes hydrothermal activity, not the creation of volcanic islands.
- Thinner crust is not the general reason volcanic island chains form; the key factors are a magma source (hotspot or subduction melting) and plate motion.
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