Earth's Structure

(km from surface)

Atmosphere 0-

Exosphere above 500-1000

Thermosphere above 640

Mesopause 85

Mesosphere -85

Stratopause 50

Stratosphere -50

Tropopause 11

Troposphere 0-7

(Thickness varies between poles and tropes from 7 to 17 km)

Oceanic Crust 0-6

Continental Crust 0-40

Mantle 20-2900

Moho 20-120

Upper Mantle 20-400

400km Discontinuity 400

Transition Region 400-650

650km Discontinuity 650

Lower Mantle 650-2740

D" 2740-2900

Core 2900-6370

Outer Core 2900-5200

Inner Core 5200-6370

http://en.wikipedia.org/wiki/Structure_of_the_Earth