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unit 2 mreview

unit 2 midterm review

QuestionAnswer
how are rocks classified? bases on how they form
compare and contrast intrusive and extrusive igneous rocks intrusive- coarse grained igneous rocks that cool slowly beneath the earth's surface. extrusive- fine grained that cools quickly onto earth's surface.
what is the composition of mafic and felsic magmas? mafic- gabbro, biotite, olivine. thinner and moves faster . low silica and is dark. felsic-quartz, feldspar. thicker and moves slow. high silica
how does the cooling rate of magma affect the texture or crystal size? it makes it smaller or larger when the magma cools fast or slower.
discuss the process of weathering as a step in the formation of sedimentary rocks.
what are the three main classes of sedimentary rocks? clastic, chemical, organic
what are the agents of erosion? water, wind, glaciers and gravity
distinguish between mechanical and chemical weathering. chemical-rocks undergo changes in composition due to chemical reactions. mechanical-
describe the main processes in chemical and mechanical weathering.
know the steps in the rock cycle wethering and erosion to sediments . depostion burial lithification to sedimentary. heat and pressure to metamorphic. mnelting to magma. cooling and crystallization to igneous. uplift to weathering and erosion
define mass movement and distinguish between 5 major types. slides, creep, rock slide, solifluction, slumps, flows, avalanches, glacier, rockfalls
describe the foliated and non foliated metamorphic rocks.
what is regional metamorphism? contact?
know how to use a soil texture diagram
Created by: dk7
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