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Rock Vocabulary

QuestionAnswer
A mixture of one or more minerals, rock fragments, volcanic glass, organic matter, or other natural materials. Rock
A model that describes how rocks slowly change from one form to another through time. Rock Cycle
Sedimentary rock forming process in which sediment grains are held together by natural cements that are produced when water moves through rock and soil Cementation
Sedimentary rock formed from decayed plant material, the world's most abundant fossil fuel Coal
Process that forms sedimentary rocks when layers of sediments are compressed by the weight of the layers above them. Compaction
Rock formed when hot magma cools and hardens Igneous Rock
Igneous rocks that form from magma from below the surface of the Earth Intrusive Rock
Igneous rock that is formed as lava cools on the surface of the Earth Extrusive Rock
Magma that reaches the Earth's surface and flows from volcanoes Lava
Rocks that cool so quickly that no mineral grains are formed Volcanic Glass
Dense, dark colored igneous rocks, that form from magma that is rich in iron and magnesium and poor in silica. Basaltic Rocks
Light-colored, silica rich rocks of lower density than basaltic rocks Granitic Rocks
Rocks that have changed because of changes in temperature and pressure or the presence of hot watery fluids. Metamorphic Rocks
Metamorphic rocks in which mioneral grains line up in parallel layers. Foliated Rocks
Metamorphic rocks in which mineral grains grow and rearrange, but layering does not occur. Nonfoliated Rocks
Loose materials such as rock fragments, mineral grains, and bits of shell that have been moved by wind, water, ice, or gravity Sediments
Formed when sediments are pressed and cemented together, or when minerals from from solution. Sedimentary Rock
Created by: MrsMorrow
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