Earth's Layers
The earth has four layers which are:
- Crust
- Mantle
- Outer Core
- Inner Core
- Crust
- Mantle
- Outer Core
- Inner Core
http://www.english-online.at/science/solar-system/layers-of-the-earth.gif
http://www.youtube.com/watch?v=Q9j1xGaxYzY