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