What is plasma?
Q: What is plasma?
A: Plasma is a 4th state of matter created by adding energy to a gas so that some of its electrons leave their atoms. This process is called ionization, and results in negatively charged electrons and positively charged ions.
Q: How does plasma react to electric and magnetic fields?
A: The charged particles in a plasma react strongly to electric and magnetic fields (i.e. electromagnetic fields).
Q: What happens when a plasma loses heat?
A: When a plasma loses heat, the ions will re-form into a gas, emitting the energy which had caused them to ionize.
Q: What percentage of matter in the visible universe is believed to be plasma?
A: Over 99% of the matter in the visible universe is believed to be plasma.
Q: How can magnetic fields be used with plasmas?
A: Magnetic fields can be used to hold a plasma, but not to hold a gas.
Q: Is plasma better than copper as an electrical conductor?
A: Yes, Plasma is usually better than copper as an electrical conductor.
Q: What are some artificial uses for plasmas on Earth?
A: Artificial (man-made) uses for plasmas on Earth include fluorescent light bulbs, neon signs, and plasma displays used for television or computer screens. Plasma lamps and globes are also popular children's toys and room decorations.
