1st Quarter Sci (Location of Plate Tectonics) Flashcards
What are the 2 Mechanical Layers
Lithosphere and Asthenosphere
What comprise the crust and uppermost part of the mantle
Lithosphere
Its rigid layers, can break under stress
Lithosphere
Broken into small and large sections called tectonic plates
Lithosphere
How thick is asthenopshere
180 km thick
What contains in asthenosphere
hot, molten rocks or magma
Mechanisms of heat transfer
Convection current
Can deform and reshape as a result of the hot, molten mantle which circulates as convection current.
Asthenosphere
What are the 4 major layers of the earth
Crust Mantel Outer core Inner core
Outermost layers of earth
Crust
how thick is the continental crust
40-70 km thick
Composition of continental crust
Granitic rocks and aluminum silicates
how thick is the Oceanic crust
7-10 km thick
Composition of Oceanic crust
Basaltic rocks and magnesium silicates
Thickest layer
Mantel
What is the thickness of Mantel
2900 km thick; 80% of Earth’s mass
Composition of Mantel
Ferro-magnesium
Matter of Mantel
Semi solid, rocky, and very hot
Temperature of Mantel
Upper- 900c and lower- 1000-3700c
Thickness of Outer core
2270 km thick
Only liquid layer of the earth
Outer core
Composition of Outer core
Liquid, iron, nickel
Temperature of Outer core
3700-4300c
Pure solid
Inner core
thickness of inner core
1220 km thick
Composition of Inner core
Solid iron
Temperature of Inner core
6000c
Boundaries between crust and upper mantle
Mohorovicic Discontinuity
Boundaries between lower mantle and outer core
Gutenberg Discontinuity
Boundaries between outer core and inner core
Lehmann Discontinuity
Describe the movement of the lithosphere
Plate Tectonic
Whats the greek word of plate tectonic
Tekton
7 Primary Plates
Eurasian
African
Australian
Antarctic
South American
North American
Pacific
8 Secondary Plates
Indian
Arabian
Scotia
Nazca
Caribbean
Cocos
Juan de Fuca
Philippine
Earth is linked to a grape that contracted into raisin due to a cooling process, occurring after the bigbang.
Raisin Theory/Contraction Theory
Explains the structure of the earth’s crust
Plate Tectonics Theory