layers of the earth

rheology

study of the flow of matter

lithosphere, asthenosphere, mesospheric mantle, inner core, outer core

earth divided MECHANICALLY

crust, upper mantle, lower mantle, outer core, inner core

earth divided CHEMICALLY

lithosphere

outer solid part of the planet

lithosphere

rigid upper part of the mantle

70-100km

lithosphere extends to-

lithosphere

underlain by asthenosphere

crust

outermost layer of earth

5-10km

how thick is crust

35km

thickness of crust under continents

60 km

thickness of crust under mountain ranges

oxygen, aluminum, silicon, iron, calcium, sodium, potassium, magnesium

8 elements of crust

mohorovicic discontinuity

separates crust from mantle

8 km

moho thickness in ocean basins

32 km

moho thickness in continental crusts

iron, silicon, aluminum, calcium, magnesium, oxygen

6 elements of mantle

870 degrees

temperature of crust

3,700 degrees

temperature of mantle

geothermal gradient

steady increase of temperature

upper mantle

highly viscous layer

660 km

upper mantle thickness

2,200 km

lower mantle thickness

core

innermost layer

iron, nickel, sulphur, oxygen

outer core 4 elements

5,000 degress

temperature of outer core

inner core

deepest region of the planet

5,000-6,000 degrees or higher

temp of inner core

1,250 km

inner core thickness

dynamo effect

the rotation of iron also creating magnetic field; circulating current.

12,756 km

size of earth

South Geomagnetic Pole, North Geomagnetic Pole

the magnetic field enters___ & exits ___

geomagnetic reverse

south and north geomagnetic pole switch places or shifts

geomagnetic field

protects us from the suns rays