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the strong, lower part of the mantle between the asthenosphere and the outer core
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the thin and solid outermost layer of the Earth above the mantle
Crust
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the solid outer layer of Earth that consists of the crust and the rigid upper part of the mantle
lithosphere
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the central part of the Earth's below the mantle also center of the sun
core
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the part of the Earth where life exists
biosphere
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the layer of rock between Earth's crust and core
mantle
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a mixture of gases that surrounds a planet or moon
atmosphere
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a system in which energy, but not matter is exchanged with the surroundings
closed system
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the portion of the Earth that is water
hydrosphere
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the mostly solid, rocky part of the Earth; extends from the center of the core to the surface of the crust w
geosphere
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a system in which both matter and energy are exchanged with the surroundings
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the way in which a mineral reflects light
luster
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the tendency of a mineral to break into irregular, uneven surfaces
fracture
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the color of a mineral in powdered form
streak
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inorganic solid with characteristics chemical composition and physical properties
mineral
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the tendancy of a mineral to split along specific planes of weakness to form smooth, flat surfaces
cleavage
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the measure of the ability of a mineral to resist scratching
hardness
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the ratio of the mass of a substances's mass to its volume
density
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rock that forms when magma cools and solidifies
igneous rock
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rock formed from the cooling and solidification of magma beneath the earth's suface
intrusive igneous rock
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rock that forms from the cooling and solidification of lava at Earth's surface
extrusive igneous rock
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magma or igneous rock that is rich in feldspars and silica and that is generally light in color
felsic
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magma or igneous rock that is rich in magnesium and iron and that is generally dark in color
mafic
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the process in which the volume and porosity of a sediment is decreased by the weight of overlying sediments
compaction
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the process in which minerals precipitate into pore spaces between sediment grains and bind sediments together to form rock
cementation
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rock that forms when fragments of preexisting rocks are compacted or cemented together
clastic sedimentary rock
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the rock texture in which mineral grains are not arranged in planes or bands
nonfoliated
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a change in the texturem structure, or chemical composition of a rock due to contact with magma
contact metamorphism
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the process in which one type of rock changes into metamorphic rock because of chemical processes or changes in temperature and pressure
metamorphism
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the rock texture in which mineral grains are arrainged in planes or bands
foliation
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a change in the texture, structure, or chemical composition of a rock due to changes in temperature and pressure over a large area
regional metamorphism
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the simplified pattern that illustrates the order in which minerals crystalize from cooling magma according to their chemical composition and melting point
Bowen's reaction series
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the series of processes in which rock forms, changes from one type to another, is destroyed, and forms again by geologic processes
rock cycle
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the process by which new oceanic lithosphere move
sea-floor spreading
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undersea mountain range
mid-ocean ridge
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magnetic field that points south
reversed polarity
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the supercontinent that formed 300 million years ago
Pangaea
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the hypothesis that continents were once joined and then broke apart
continental drift
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the theory that explains how large pieces of the lithosphere move
plate tectonics
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a mixture of gases primarily nitrogen, oxygen, and argon, that surrounds the earth
atmosphere
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the lowerst layer of the atmosphere, in which temperature drops at a constant rate as altitude increases; weather conditions exist here
troposphere
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the layer of the atmosphere in which temperature increases as altitude increases
stratosphere
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the coldest layer of the atmosphere, between the stratosphere and the thermosphere in which temperture decreases as the altitude increases
mesosphere
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the uppermost layer of the atmosphere, includes the ionosphere
thermosphere
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