Electricity
Electricity exists thanks to positive and negative charges, largely carried by two subatomic particles: protons, which are positively charged, and electrons, which are negatively charged.
Opposite charges attract each other, while like charges repel. Whenever one of these charged particles moves, it creates an electrical current.
Every time someone turns on a light, electrons move from an area of negative charge through a wire toward an area of positive charge, generating a current to power the bulb. Electricity isn’t just useful for appliances; it also plays a fundamental role in biology, powering animals’ nervous system.
Neurons communicate with the help of electrically charged atoms, or ions, generating electrical impulses that power things like muscle movement.
