Glossary E
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
 

Electric Charge

This is one of the properties that all matter has. A particle can be positive, negative or neutral (if it has no charge). Particles with positive electric charge are attracted to those with negative electric charge.
 

Electric Circuit

A complete path through which electrons can flow.
Electromagnetic Force

Electric Force

This is one of the fundamental forces of nature, like gravity. This force can either pull particles together or push them apart, depending on whether the electric charges are opposite or the same.
Accelerator

Electricity

The movement of electric charges, such as electrons, through a material, such as a wire. Electricity moves more easily through some types of material (conductors) than others (insulators).

 

Electromagnetic Force

See electric force.
 

Element

A substance that cannot be separated into simpler substances by chemical means. Examples include helium, oxygen and carbon.
Click here to see the Periodic Table of the Elements
Atom

Electron

One of the smallest particles known today. It is the least massive particle of the lepton group with a negative electric charge. Electrons can be in the outer parts of most atoms. Elly is shown here as an electron.

 

Endothermic Reaction

A chemical reaction in which kinetic energy is transferred into a system (the chemical reaction) from surrounding material.
 

Energy

Energy is something that that everything has, and there are many different kinds (e.g. chemical, electrical). Energy can’t be created or destroyed. If one thing gains energy, something else must lose energy. A thing that is moving fast has more energy than if it were moving slow. A thing that is hot has more energy than if it were cold
 

Exothermic Reaction

A chemical reaction in which kinetic energy is transferred out into surrounding materials.
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |