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Inside Earth Book Vocabulary
Chapter 3/Sections 1 & 3
14
Science
8th Grade
07/07/2005

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Cards

Term
volcano
Definition
a weak spot in the crust where magma has come to the surface
Term
magma
Definition
the molten mixture of rock-forming substances, gases, and water from the mantle
Term
lava
Definition
liquid magma that reaches the surface
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
Term
shield volcano
Definition
a wide, gently sloping mountain made of layers of lava and formed by quiet eruptions
Term
cinder cone
Definition
a steep, cone-shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening
Term
composite volcano
Definition
a tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials
Term
caldera
Definition
the large hole at the top of a volcano formed when the roof of a volcano's magma chamber collapses
Term
volcanic neck
Definition
a deposit of hardened magma in a volcano's pipe
Term
dike
Definition
a slab of volcanic rock formed when magma forces itself across rock layers
Term
sill
Definition
a slab of volcanic rock formed when magma squeezes between layers of rock
Term
batholith
Definition
a mass of rock formed when a large body of magma cooled inside the crust
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