Plasma , like ordinary matter, is made up of atoms. Atoms are so tiny that more than a million can fit across the head of a pin. When gases are exposed to enough heat or other radiation , their electrically neutral atoms split into positively charged fragments called ions and negatively charged free electrons. Because plasma consists of electrically charged particles, it acts very differently from ordinary forms of gas. A field is an influence or force that exists throughout space, that one body exerts on another.
Gravity is one such field.
All matter responds to gravity, but if matter is electrically charged or contains currents, it also responds to electric and magnetic forces. Electric charges and changing magnetic fields produce electric fields. Here on Earth, we have learned how to produce electricity by using motors, called generators, that cause magnetic fields to change. These changing magnetic fields create the electric current we use in our homes. For instance, flows of molten metals deep inside Earth's core cause currents which sustain a huge magnetic field that extends far into space.