Key term
AQA GCSE Physics 8463
Atomic Structure
Topic overviewThe structure of an atomMass number, atomic number and isotopesFrom the plum pudding model to the nuclear modelChadwick, the neutron, and comparing the modelsRadioactive decay and nuclear radiationNuclear equationsHalf-lives and the random nature of radioactive decayRadioactive contaminationBackground radiationUses of nuclear radiation, and how half-life affects hazardNuclear fission and nuclear fusion
Electricity
Topic overviewCircuit symbols, electrical charge and currentCurrent, resistance and potential differenceOhmic conductors, filament lamps, diodes and thermistorsLight-dependent resistors, and investigating resistanceCurrent and potential difference in series and parallelConstructing circuits, and calculating in series circuitsDirect and alternating potential difference, and mains electricityPower and efficiencyAppliances, and the energy transferred by electrical workPower, and the power ratings of domestic appliancesThe National GridStatic chargeElectric fields
Energy
Forces
Topic overviewScalars, vectors, forces and the resultant forceGravityWork done and energy transferStretching, compressing, and the spring constantLinear and non-linear extension, and work done on a springMoments, levers and gearsPressure at a surface, and the equation p = F over APressure in a column of liquid, upthrust and floatingAtmospheric pressureResolving forces and free body diagramsDistance, displacement and speedThe speed of sound, and the distance-speed-time equationVelocity and the distance-time relationshipAcceleration, deceleration and velocity-time graphsArea under a velocity-time graph, and the uniform acceleration equationNewton's First LawNewton's Second and Third LawsStopping distance and reaction timeFactors affecting braking distanceBraking force, deceleration and the dangers of stopping quicklyMomentum and its conservationChanges in momentum
Magnetism and Electromagnetism
Topic overviewPoles of a magnetMagnetic fields around a magnetThe compass, and plotting a magnetic fieldElectromagnetismFleming's left-hand rule, motors and loudspeakersInduced potentialThe generator effect, alternators, dynamos and microphonesThe structure of a transformer and the turns ratioTransformer power, and using the transformer equations
Particle Model of Matter
Space Physics
Waves
Topic overviewTransverse and longitudinal waves, and the wave equationWave properties, and refraction at a boundaryReflection of wavesSound wavesUltrasound, echo sounding and seismic wavesTypes and uses of electromagnetic wavesRadio waves, and the hazards of ultraviolet, X-rays and gamma raysLensesVisible lightEmission and absorption of infrared radiation, and black bodies
Atomic Structure
Nuclear fission and nuclear fusion
- 3 things to know
- Paper 1
Overview
Nuclear fission and the elements commonly used, spontaneous fission and absorbing a neutron to trigger it, the products and energy released and how that energy is used in a power station, chain reactions controlled in a reactor and uncontrolled in a nuclear weapon, nuclear fusion and its mass converted to energy, and how fusion and fission differ.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Name two elements whose nuclei are commonly used to produce fission.
Key term
What is produced when a nucleus undergoes fission?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is nuclear fission?
Model answer
It is the splitting of a large and unstable nucleus into smaller nuclei.
- 2
Name two elements whose nuclei are commonly used to produce fission.
Model answer
Uranium and plutonium.
- 3
How common is spontaneous fission?
Model answer
It is rare.
- 4
What must usually happen to an unstable nucleus before it will undergo fission?
Model answer
It must first absorb a neutron.
- 5
What is produced when a nucleus undergoes fission?
Model answer
Two smaller nuclei that are roughly equal in size, two or three neutrons, and gamma rays.
- 6
How many neutrons are typically released by a single fission?
Model answer
Two or three neutrons.
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