6th Grade Chapter 3 Section 1 Volcanoes

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volcano
a weak spot in the crust where magma has come to the surface
magma
a molten mixture of rock-forming substances, gases, and water from the mantle
lava
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