Matter is our surrounding of Class 9
This state consists of super energetic and super excited particles. These particles are in the form of ionised gases.
For e.g : Neon sign bulb and Fluorescent tube
Neon sign bulb - Neon gas
Fluorescent tube - Helium gas
When electrical energy flows through gas, it gets ionised and hence plasma is created. Plasma glows with a special colour depending on nature of gas. Sun and the stars glow because of the pressure of plasma.
Further Reading :