Hazardous Earth: Earth structure Flashcards
1
Q
First layer of the earth
A
Inner core
2
Q
Second layer
A
Outer core
3
Q
Third layer
A
Mantle
4
Q
Fourth layer
A
Asthenosphere
5
Q
Fifth layer
A
Lithosphere
6
Q
Oceanic crust
A
Dense : 3.5g/cm3 Thin : 6-8km Basalt Solid 900ºC
7
Q
Continental crust
A
Less Dense : 2.7 g/cm3 Thick : 30-50km Solid 900C Granite
8
Q
Asthenosphere
A
Partially molten Density:3.4-4.4 g/cm3 Peridotite 900-1600C 75-250km
9
Q
Lower mantle
A
Peridotite Solid Dense: 4.5-6.3 g/cm3 1600-4000C 2900km
10
Q
Outer core
A
10 g/cm3 Liquid Iron/nickel 4000+ C 5270km
11
Q
Inner core
A
Solid
Iron/nickel
5000+C
6370km
12
Q
Radioactive decay
A
Old material decaying and producing heat energy
13
Q
Convection currents
A
Heat rising and falling in the mantle and moving the crust.
