Plasma

Plasma is the fourth state of matter, and the most common one. 99.9% of all matter (not including debated matter, such as Dark Matter) is in fact Plasma! You may say, Sidd, I only encounter Solids, Liquids, and Gasses! Nobody ever told me about Plasma, not even School. The reason is that the concepts are complicated and you do not live on the sun.

Plasma in many cases behaves like a gas, but plasma and gas are very different.

Many People have Plasma Lamps or Plasma T.V.s, but those are only artificial sources of Plasma. Terrestrial Examples are Lightening, the Ionosphere, and the polar auras. Astronomical Plasma include the Sun, solar winds, and Interstellar nebulae.

An example of plasma the layman has seen is Lightening. See Below.

For more information See: NASA Link