Structure of the earth Flashcards
1
Q
name the 4 structures of the earth
A
- crust
- mantle
- outer core
- inner core
2
Q
what is the core made of?
A
iron + nickel
(solid)
3
Q
what is the inner core made of
A
molten iron + nickel
4
Q
what is the temp of the core
A
> 5000
5
Q
how is the core heated
A
primordial heat
radioactive heat(plutonium)
6
Q
what is the mantle made of
A
molten/semi molten silicates
7
Q
what is the crust made of
A
rocks (solid):
-igneous
-metamorphic
-sedimentary
8
Q
how thick is continental crust
A
30-40 km deep
9
Q
how thick is oceanic crust
A
6-10 km deep
10
Q
what is the density of the continental plate
A
2.6g/cm^3
11
Q
what is the density of the oceanic plate
A
3.0g/cm^3
12
Q
what is the main component of the continental crust
A
granite
13
Q
what is the main component of the oceanic crust
A
basalt
14
Q
A
