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Chapter 22 Vocab Review
Mr. Whites Class*Integrated Science
27
Science
9th Grade
04/26/2007

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Term
Geologists
Definition
Scientists who have studied the Earth and proccesses that have shaped Earth over time.
Term
Uniformitarianism
Definition
The principal that geological processes operating today also operated in the past.
Term
Crust
Definition
The rocky outer layer of Earth.
Term
Silicates
Definition
A rock made of compounds of silicon and oxygen generally containing metals such as alluminum, Iron, or oxygen.
Term
Mantle
Definition
The thick layer of hot, yet solid rock beneath Earths crust.
Term
Lithosphere
Definition
A layer of relactively cool, rigid rock that includes the uppermost part of the mantle as well as Earths crust.
Term
Asthenosphere
Definition
A layer of softer weaker rock beneaths Earths lithosphere, which can flow slowly.
Term
Mesosphere-
Definition
The Lower portion of Earths mantle.
Term
Core
Definition
The dense sphere at Earths center, made mostly of Earths center, made mostly or IRON and Nickel.
Term
Rock
Definition
A solid combination of metals or other materials.
Term
Inorganic
Definition
A description of a material that isnt organic.
Term
Streak
Definition
A color of a minerals powder.
Term
Luster
Definition
The way a minerals surface reflects light.
Term
Hardness
Definition
The resistance of a mineral to scratching.
Term
Fracture
Definition
The way a mineral breaks, determined by the minerals crystal structure.
Term
Cleavage
Definition
A minerals tendency to split along regular well defined planes.
Term
Igneous Rock
Definition
Rock that forms from magma or lava.
Term
Magma
Definition
A mixture of molten rock and gases including water vapor which forms underground.
Term
Lava
Definition
Magma that flows over the Earths surface.
Term
Instrusive Rock
Definition
An igneous rock that forms underground by hardened magma.
Term
Extrusive Rock
Definition
An igneous rock that forms on Earths surface.
Term
Sediment
Definition
Small,solid pieces of material that come from rocks or living organisms.
Term
Sedimentary Rocks
Definition
Rocks that form overtime as a sediment is squeezed and cemented together.
Term
Clastic Rocks
Definition
Sedimetary rocks that form from broken fragments of other rocks.
Term
Metamorphic Rock
Definition
Rock that has been changed by temperature pressure or reactions with hot water.
Term
Foliated Rocks
Definition
A metamorphic rock crystalline arranged in parralel bands.
Term
Rock Cycle
Definition
A series of procceses in which rocks continously change from one type to another,
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