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The structure of the Earth

Layers based on chemistryCrust, mantle, core
Layers based on physical propertiesLithosphere, asthenoshpere, mesosphere, outer core, inner core
lithospherecool, rigid solid
asthenospherehot and semi-liquid
outer coreliquid
inner coresolid, center of the earth
plasticitysoft and flowing, not completely liquid
lithospherecrust and upper mantle
types of crustcontinental and oceanic
crustaluminum, iron and magnesium silicates
mantleiron and magnesium silicates
coreiron and nickel
solidpressure is greater than temperature
liquidtemperature is greater than pressure
convectioncircular flow of matter
seismic wavessudden movements of the earth's crust
direct evidencevolcanic activity
indirect evidenceseismic waves
mohoboundary between crust and mantle
shadow zonezone where no waves can be detected
P wavescan travel through liquids
S wavescannot travel through liquids
P and Stypes of seismic waves
temperature is higher than pressureliquidlayer is formed
pressure is higher than temperaturesolid layer is formed
temperature and pressure are equalsemi-liquid layer is formed

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