_____ is a natural force produced by the movement of electrons.

The most common natural source of electricity is _____.

The first truly successful application of electricity was made in 1837 with the _____.

The _____ was invented by Alexander Graham Bell and was patented in 1876.

The _______ was invented by Thomas Edison in 1878.

A _____ is defined as a complete electrical path.

A typical circuit includes these four components: ____, ____, ____, and a ____.

The _____ in a circuit are the wires that carry the electricity.

In a circuit, the ____ is a device, such as a light or appliance, that we want to run with electricity.

In a circuit, the ____ is the device we use to turn the electricity flow on and off.

When the switch is turned off in a circuit, the path of the circuit is broken. This is called an ______.

When the switch is turned on in a circuit, it completes the circuit. This is called a ______.

_____ are tiny atomic particles that have a negative electrical charge,

The end of a battery that's marked with a negative sign (-) is called the ______.

The end of a battery that's marked with a positive sign (+) is called the ______.

The negative terminal of a battery has _____ electrons and the positive terminal has _____ electrons.

The flow of electrons through a circuit is called ______.

All matter in the universe is formed from 100 or so different substances called _____.

The _____ is the smallest particle of a element.

All atoms are made up of atomic particles called ____, ____, and ____.

_____ are the smallest type of atomic particle.

_____ are heavier than electrons and have a positive charge.

_____ have no electrical charge at all. (they are neutral)

A _____ atom is the simplest of atoms. It has 1 electron and 1 proton.

The center of an atom is called the _____.

The copper atom contains ___ electrons and ___ protons.

Electrons orbit the nucleus of an atom in many layers called _____.

_______ orbit the nucleus in the outermost electron shell and are easily dislodged from their orbit. (copper atoms are a good ex.)

A common way to remove electrons from their orbit is _____ (rubbing).

Any substance in which electrons can move freely is a _____.

George Ohm was the first to discover the existence of ____, ____, and ____.

Two of the best known conductors of electricity are ____ and ____.

_____ means how well a material carries electricity.

_____ is commonly use in resistors because its atom has 4 electrons in its outermost shell.

The ohm measurement was named after _______.

_____ is a better conductor than copper because its atom's free electron is one more shell farther away from its nucleus than copper's.