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Types of Rocks

TermDefinition
igneous rock rock formed from the cooling of magma or lava
sedimentary rock rock formed from particles of rock and sediments pressed together
metamorphic rock rock formed from another rock being changed by heat, pressure, or chemical reactions
intrusive igneous rock that forms when magma cools inside the earth; it has a coarse-grained structure
extrusive igneous rock that forms when lava cools outside a volcano; it has a fine-grained structure
weathering & erosion Step 1 of forming sedimentary rocks Weathering occurs when acid, wind, water, or physical damage breaks down a rock. Erosion moves the particles.
deposition Step 2 of forming sedimentary rocks Sediments settle (are deposited) after being carried by wind or water
compaction Step 3 of forming sedimentary rocks Sediments are pressed together (compacted)
cementation Step 4 of forming sedimentary rocks Sediment particles are glued together and minerals crystalize
fine grain Very small particles in rocks that cannot be seen by the eye
coarse grain Large particles of minerals or other rocks that can be seen in a rock
Created by: abbyteske
 

 



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