A plasma is alot like a gas. Actually, it is an ionized gas meaning that it has a continual loss of electrons. A plasma contains charged particles, positive ions, and negetive electrons.
Some possible places to find plasma:
  • Neon Signs
  • Stars
  • Northern Lights
  • Incandecent Lightbulbs

That is the short definition. You really don't want to hear the long one. If you'd like to learn more, go to one of the following links of your choice: