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 : 

1. Kinematic Molecular Theory of Gases

2. Evaporation

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