To all you budding scientists - see if you can learn all of these!

ALTERNATING CURRENT
Electric current in which electrons fluctuate many times per second.

AMPERE (A )
An ampere (or amp) is the standard unit of electrical current. 1 ampere is equal to the current that produces 2 ten millionths of a newton between 2 parallel wires, 1 metre apart.

CALORIE (cal or kcal)
A calorie is the standard unit of energy in food. 1 calorie is equal to 4,187 joules.

CHEMICAL ENERGY
The energy stored in chemical compounds.

CIRCUIT
The path along which an electric current flows.

CONDUCTOR
A substance through which electricity can flow.

COULOMB (C )
A coulomb is the standard unit of electric charge. 1 coulomb is the charge delivered by a current of 1 ampere flowing for 1 second.

DIRECT CURRENT
Electrical current which flows in one direction only.

ELECTRIC CURRENT
The flow of electric charge through a material.

ELECTRICAL EARTH
An electrical connection to the ground.

ELECTROMAGNETIC INDUCTION
The use of magnetism to produce electricity.

ELECTROMOTIVE FORCE (emf)
The force that makes electrons move in an electric current.

GENERATOR
A machine that converts motion into electricity.

GRAVITY
The force of attraction between objects of mass. The size of the force depends on the masses of the objects and the distance between them.

GRID
A network of cables which transmits electricity throughout a region.

INSULATOR
A substance that does not allow electricity to flow through it.

JOULE (J )
A joule is the standard unit of energy. 1 joule is produced when a force of 1 newton moves 1 metre, or when an electric current of 1 ampere flows through a potential difference of 1 volt for 1 second. A kilojoule (kJ) is 1000 joules.

KILOWATT-HOUR (kWh)
A kilowatt-hour is a practical unit of work. 1 kilowatt-hour is the energy transferred by maintaining the power of 1 kilowatt for 1 hour.

KINETIC ENERGY
The energy of a moving object.

NEWTON (N)
A newton is the standard unit of force. 1 newton causes a mass of 1 kilogram to move with an acceleration of 1 metre per second squared.

OHM ()
An ohm is the standard unit of electrical resistance. 1 ohm of resistance causes a potential difference of 1 volt to produce a current of 1 ampere.

PASCAL (Pa )
A pascal is the standard unit of pressure. 1 pascal is equal to a force of 1 newton applied to an area of 1 square metre.

POTENTIAL ENERGY
Energy that is stored.

RESISTANCE
The degree to which a material resists electric current.

SOLAR ENERGY
Heat and light energy from the sun.

SWITCH
A device which controls the flow of electrical current through a circuit.

TRANSFORMER
A device that changes the voltage and current of an electric supply.

VOLT (V )
A volt is the standard unit of potential difference. 1 volt makes a current of 1 ampere produce 1 joule of energy every second.

VOLTAGE
Voltage is the measure of eletromotive force (emf) on particles with electric charge. Electromotive force pushes electrons around a circuit.

WATT
A watt is the standard unit of power. 1 watt is the conversion of 1 joule of energy from one form to another in 1 second.
A kilowatt (kW) is 1000 watts.
A megawatt (MW) is 1 million watts.