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a weak spot in the crust where magma has come to the surface


a molten mixture of rock-forming substances, gases, and water from the mantle


magma that reaches Earth's surface

Ring of Fire

a major belt of volcanoes that rims the Pacific Ocean

volcanic belts

form along the boundaries of Earth's plates

island arc

A string of islands formed by the volcanoes along a deep-ocean trench.

hot spot

An area where magma from deep within the mantle melts through the crust above it.

Hawaiian Islands

example of a hot spot

Caribbean Islands

example of an island arc

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