What is Plasma? Matter is often divided into solid, liquid, and gas, but plasma can be created by further heating gas. For this reason, plasma is often described as the “fourth state” of matter. Plasma is the ionized state of matter. Ionization is a phenomenon in which a molecule or atom breaks apart and separates into electrons and ions. ハカセ Plasma is created when particles (ions, electrons, and atoms) collide with each other. What kind of environment creates plasma? はてなさん ハカセ Plasma is mainly generated in ultra-high temperature regions such as the sun or when high voltages are applied to ...