RLNI+3.1

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Vocabulary

 * Volcano**: weak spot in the crust where magma (molten material) comes out
 * Magma**: molten mixture of rock-forming substances, gases, and water from mantle
 * Lava**: when magma reaches a surface
 * Ring of Fire**: major volcano belt, formed by many volcanoes that rim the Pacific Ocean
 * Island Arc**: resulting volcanoes create a string of islands
 * Hot Spot**: area where magma from deep inside the mantle melts through the crust like a blow torch

Outline

 * What is a Volcano?**