There are 10 Layers of the Earth, (5 Being the Earth and 5 Being the Atmosphere).
Inwards to Outwards:
Inner Core
http://en.wikipedia.org/wiki/Inner_core
Outer Core
http://en.wikipedia.org/wiki/Outer_core
Mantle
http://en.wikipedia.org/wiki/Mantle_(geology)
Upper Mantle
See Mantle
Crust, (we are standing here)
http://en.wikipedia.org/wiki/Crust_(geology)
Troposphere, (above us is this)
http://en.wikipedia.org/wiki/Troposphere
Stratosphere
http://en.wikipedia.org/wiki/Stratosphere
Mesosphere
http://en.wikipedia.org/wiki/Mesosphere
Thermosphere
http://en.wikipedia.org/wiki/Thermosphere
Exosphere
http://en.wikipedia.org/wiki/Exosphere
