Science Concept: What Is Electricity?
Electricity is a form of energy carried by the
movement of electrons. An electron is a particle
that orbits the center of an atom. The electrons
of some atoms, like those of copper and other metals, are only loosely
attached, which allows electricity to travel through these materials
easily. These types of materials are known as “conductors.”
An outside force—such as light, heat, pressure, or a chemical
reaction—can cause electrons to break free and get “bumped”
from one atom to the next. A sequence of electrons then passes from
atom to atom. This continuous flow of electrons from atom to atom
through a conductor is called electric current.
An outside force causes one or more electrons
to get "bumped" to an adjacent atom, which in turn
forces that atom to give up one or more electrons to the atom
next to it, and so on along the length of the conductor.
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