Volcanoes

Where are the majority of the world's volcanoes located?

• In the center of continents, away from tectonic activity.
• Scattered randomly across the globe, with no pattern.
• Underneath the ocean, far from landmasses.
• Along tectonic plate boundaries, especially the Pacific Ring of Fire.

Why does magma rise through the Earth's mantle toward the surface?

• Magma rises due to high pressure from below.
• Magma rises because it is less dense than the surrounding rock.
• Magma rises as a result of tectonic plate movement.
• Magma rises because it is cooler than surrounding rock.

On the VEI scale, what is the most powerful volcano rating ever recorded?

• 6
• 8
• 7
• 9

What is one positive long-term effect of volcanic eruptions?

• They make the air cleaner.

• They stop earthquakes from happening.

• They cool down the Earth's core.

• They provide nutrients, enriching the soil.