Science P3

a source of energy before conversion to useful energy

fuel such as coal, oil or natural gas formed millions of years ago from dead plant and animal

radioactive fuels

fuel such as wood and ethanol obtained from living plants

a more convenient form of energy such as electricity and refined fuels

a gas such as carbon dioxide that reduces the amount of infra-red radiation escaping from earth into space. contributes to global warming

gradual increase in the average temperature of earth's surface

unit of power

amount of energy that something transfers each second measured in watts

a measure of the energy carried by an electrical current

a flow of electrons through an electrical circuit

speed, the amount of times something does something in a set time period

an assessment or classification according to a scale.

part of an electrical circuit

diagram showing how the energy used is transferred into useful and waste energy

the amount of energy put in/ out

a measure of how effectively an appliance transfers energy into useful energy

equipment for producing electricity

a magnet that is only a magnet when switched on

device that makes a generator spin thus creating electricity

the part of a nuclear power station where energy is released from nuclear fuel

a material that randomly emits ionising radiation from its atomic nuclei

uses the wind to create energy

uses wave power to create energy

uses water to create energy