Electricity

Electricity is vital but invisible. It is caused by charged particles like protons and electrons. Until recently, it was impossible to study individual charges. Electricity has become the most important source of energy in the world, yet no one has ever seen an electric charge and until this century it was impossible to isolate and study individual charges of electricity. Electricity is a natural phenomenon that comes about because of the negatively and positively charged particles of matter. These particles are tiny parts of atoms called protons and electrons.