Long Quiz 2_Geosphere Flashcards
(36 cards)
Study of the solid earth that includes the continental and oceanic crust as well as various layers of earth
Geosphere
Geologic layers
Crust
Mantle
Lithosphere
Asthenosphere
Core
2 types of crust
Continental crust
Oceanic crust
The rocky outermost and thinnest layer, made of solid rocks and minerals
Crust
Types of crust
Continental crust
Oceanic crust
Thicker but less dense crust, made mostly of granite
Continental crust
Thinner but denser crust, made mostly of basalt
Oceanic crust
Continental and oceanic crust = what elements?
Cont = SiAl Silicate and Aluminum
Ocea = SiMa Silicate and Magnesium
Most abundant elements in the crust?
Oxygen
Silicon
Aluminum
Middle layer of the earth,
Mantle
Two divisions of mantle
Upper
Lower
Mantle with lithosphere and asthenosphere, rigid and solid
Upper mantle
Responsible of tectonic activity
Upper mantle
Hotter and denser, much less ductile due to high pressure
Lower mantle
Rocky sphere under the upper mantle
Lithosphere
Dense and weak sphere of the upper mantle that causes tectonic movement
Asthenosphere
Hot and dense center of the earth, believed to be mettalic
Core
2 parts of the core
Inner and outer core
Composed of liquid iron and nickel, low viscosity, malleable
Outer core
Hot dense ball of solid iron and nickel, intense pressure and density
Inner core
Layer boundaries
Mohorivic discontinuity
Repetti ~
Gutenberg ~
Lehmann ~
Types of rocks
Sedimentary
Igneous
Metamorphic
Formed by years and years of sediment compacting together and becoming hard
Sedimentary
Study of the layers of the earth
Strata