Earth
Figure 1: The Earth and its interior layers.[1]
Earth is the planet people live on Figure 1, but can also mean electrical grounding. Usually calling the ground wire the Earth is a British term.
Earth the planet has a rich structure under the surface, read about that at Cross section of the Earth.
References
- ↑ Wikimedia Commons [Public Domain], Available: http://commons.wikimedia.org/wiki/File:Earth-crust-cutaway.png
