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What is a rock? A mixture of minerals, rocks fragments, volcanic glass, organic matter, or other natural materials
What are the four most common rock forming minerals? Quartz, Mica, Feldspar, Hornblende
What is the characteristic of Quartz? Usually white to clear
What is the characteristic of Mica? Muscovite, light and biotite, dark
What is the characteristic of Feldspar Pink in color
What is the characteristic of Hornblende usually dark colored
What is the rock cycle A diagram/model that shows how rocks slowly change through time
What are the 3 types of rocks Igneous, Metamorphic, Sedimentary
Rocks are classified based on how they what? Form
What are the processes by which rocks change? Weathering, melting, erosion, heating, cooling, compaction, cementation, deposition, pressure
True or False The changes that take place in the rock cycle never destroy or create matter True
How is igneous rocks formed? Magma/lava cools and hardens
What are they types of igneous rocks Intrusive, extrusive, volcanic glass
What are the characteristics of Intrusive Rocks? Rocks that form from magma below the earth's surface
What are the characteristics of Extrusive Rocks? Rocks that form from lava on the earth's surface
What are the characteristics of Volcanic Glass? Pumice, obsidian, and scoria are examples of volcanic glass
What are the classifications of Igneous Rocks? By the type of magma/lava that they form
What are basaltic Rocks? Igneous rocks, dense, dark colored rocks. Made mostly of iron and magnesium
What are Granitic Rocks? Igneous rocks , light - colored rocks of lower density that basaltic rocks. made mostly of silicon and oxygen
What are Andesitic Rocks? Igneous rocks, have mineral compositions between those of basaltic and granitic rocks Usually red to pink in color, but not always
What are the formations of Metamorphic Rocks? changes in temperature and pressure or the presence of hot watery fluids
What can metamorphic rocks form from Igneous, sedimentary, or other metamorphic rocks
What are the classifications of metamorphic rocks? by its composition and texture
What are foliated rocks? when mineral grains line up in parallel layers or bands
What are nonfoliated rocks? mineral grains that grow and rearrange, but they don't form layers and layering does not occur
What are the formations of sedimentary rocks? Sediments are loose materials such as rock fragments, mineral grains, and bits of shell that have been moved by wind, water, ice, or gravit
How are they formed? when sediments become pressed or cemented together, or when minerals form from solutions and often form in layers
What are sedimentary rocks classified by? detrital, chemical, or organic
What are the Sizes of Sediments? Clay - Shale, Silt - Siltstone, Sand - Sandstone, Gravel - Conglomerate & Breccia
What are the 3 processes of forming sedimentary rocks? Cementation, compaction, evaporation
What is cementation? Occurs when larger pieces of sediments are naturally cemented together to form sedimentary rock
What is compaction? occurs when small pieces of sediment are pressed together by the layers above them to form sedimentary rock
What is evaporation? occurs when solutions evaporate and form rocks
Created by: ssigler13