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 AAtmospheric pressureDistance, 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 quickly
Magnetism and Electromagnetism
Particle Model of Matter
Space Physics
Waves
Topic overviewTransverse and longitudinal waves, and the wave equationWave properties, and refraction at a boundaryReflection of 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
Energy
Energy transfers in a system
- 3 things to know
- Paper 1
Overview
Conservation of energy and closed systems, dissipated energy and why it is wasted, reducing unwanted transfers with lubrication and thermal insulation, how thermal conductivity and wall thickness affect how quickly a building cools, and the practical comparing materials as thermal insulators with its variables and results.
What you need to know
Answer each one before you reveal it.
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Key term
Describe a method for comparing how well different materials work as thermal insulators.
Key term
State whether energy can be created or destroyed, and name the three things that can happen to it instead.
Questions from this subtopic
Each one with the model answer underneath.
- 1
State whether energy can be created or destroyed, and name the three things that can happen to it instead.
Model answer
Energy cannot be created or destroyed; it can be transferred usefully, stored, or dissipated.
- 2
A device is said to use up energy. Correct this statement.
Model answer
Energy is not used up; it is transferred to other stores, some usefully and some dissipated to the surroundings.
- 3
State what is meant by a closed system.
Model answer
It is a system in which no energy is transferred into or out of the system.
- 4
State the net change in the total energy of a closed system when energy is transferred within it.
Model answer
There is no net change; the total energy stays the same.
- 5
A sealed vacuum flask holds hot water and a cold metal block. Describe the energy transfer and state the total energy afterwards.
Model answer
Energy is transferred from the thermal store of the water to the thermal store of the block until they reach the same temperature, and the total energy is unchanged.
- 6
State what is meant by dissipated energy.
Model answer
It is energy that has been transferred to less useful stores, usually the thermal stores of the surroundings.
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