Physics Terms, CIE IGCSE
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| 677025459 | a.c. generator | a device, such as a dynamo, used to generate alternating current (a.c.) | |
| 677025460 | acceleration | (physics) a rate of change of an object's velocity | |
| 677025461 | acceleration due to gravity | the acceleration of an object falling freely under gravity | |
| 677025462 | acceleration of free fall | the acceleration of an object falling freely under gravity | |
| 677025463 | activity (nuclear) | the rate at which nuclei decay in a sample of a radioactive substance | |
| 677025464 | air resistance | the friction force on an object moving through the air | |
| 677025465 | Alpha decay | the decay of a radioactive nucleus by the emission of an alpha particle | |
| 677025466 | alpha particle | a particle of two protons and two neutrons emitted by an atomic nucleus during radioactive decay | |
| 677025467 | alternating current (a.c.) | electric current that flows first one way and then the other in a circuit | |
| 677025468 | ammeter | a meter for measuring electric current | |
| 677025469 | amp, ampere (A) | the SI unit of electric current | |
| 677025470 | amplitude | the greatest height of a wave above its undisturbed level | |
| 677025471 | angle of incidence | the angle between an incident ray and the normal to the surface at the point where it meets a surface | |
| 677025472 | angle of reflection | the angle between a reflected ray and normal to the at the point where it reflects from a surface | |
| 677025473 | angle of refraction | the angle between a refracted ray and the normal to the surface at the point where it passes from material to another | |
| 677025474 | average speed | speed calculated from total distance travelled divided by total time taken | |
| 677025475 | axis | the line passing through the centre of a lens, perpendicular to the surface | |
| 677025476 | background radiation | the radiation from the environment to which we are exposed all the time | |
| 677025477 | barometer | an instrument used to measure atmospheric pressure | |
| 677025478 | battery | two or more electrical cells connected together in series (the word may also be used to mean a single cell) | |
| 677025479 | becquerel (Bq) | the SI unit of activity per second | |
| 677025480 | 1 Bq | 1 decay per second | |
| 677025481 | beta decay | the decay of a radioactive nucleus by emission of a beta particle | |
| 677025482 | beta particle | a particle (an electron) emitted by an atomic nucleus during radioactive decay | |
| 677025483 | biomass fuel | a material, recently living, used as a fuel | |
| 677025484 | boiling point | the temperature at which a liquid changes to a gas (at constant pressure) | |
| 677025485 | Boyle's law | the law that relates the pressure and volume of a fixed mass of gas | |
| 677025486 | Boyle's law equation | pV = constant at constant temperature | |
| 677025487 | Brownian motion | ... |
