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Volcanoes
Inside Earth: Chapter Three, Section One
Term | Definition |
---|---|
volcano | a weak spot in the crust where magma has come to the surface. |
magma | the molten mixture of rock-forming substances, gases, and water from the mantle. |
lava | liquid magma that reaches the surface; also the rock formed when liquid lava hardens |
Ring of Fire | a major belt of volcanoes that rims the Pacific Ocean. |
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. |