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Chapter 3, section 1
Volcanoes and Plate Tectonics
6
Science
6th Grade
03/06/2014

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Term
volcano
Definition
A weak spot in the Earth's crust where molten material, or magma, comes to the surface.
Term
magma
Definition
A molten mixture of rock forming substances, gases, and water from the mantle.
Term
lava
Definition
Liquid magma that reaches the surface; also the rock formed when liquid lava hardens.
Term
Ring of Fire
Definition
A major belt of volcanoes that rims the Pacific Ocean.
Term
island arc
Definition
A string of islands formed by the volcanoes along a deep ocean trench.
Term
hot spot
Definition
An area where magma from deep within the mantle melts through the crust above it.
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