Layers of the Earth Flashcards
order the layers
crust, mantle: upper, transition, lower, d”, outer core, inner core
the depth of 2900 km
mantle
most less than 100 million years old
crust
ocean or continental
crust
convection
outer core
Upper, Transition, Lower, & D”
Mantle
thinner in ocean
crust
solid or plasma(with density of a solid)
inner core
basalt or granite
crust
mostly iron
inner core
high temperatures make it pliable
mantle
dynamo theory
outer core
thickest layer
mantle
could be a single iron crystal
inner core
solid but nearly liquid
mantle
forms earth’s magnetic field
outer core
liquid
outer core
thicker on land
crust
iron mixed with nickel
outer core
5-70 km thick
crust
solid rock
crust
flows very slowly over long periods of time
mantle
Planetary differentiation steps
order
layers form
step 3
layers locked in position
step 6
planet cools over time
step 4
dense materials sink while less dense materials float
step 2
mass of planet is molten
step 1