Key term
Edexcel GCSE Combined Science Physics 1SC0
Key Concepts of Physics
Motion and Forces
Topic overviewScalar and vector quantitiesExamples of vectors and scalars, and velocitySpeed, distance, time and distance-time graphsAcceleration and the equation v squared minus u squaredVelocity-time graphs and free fallMeasuring speed in the laboratory, and typical everyday speedsNewton's first law, and investigating force, mass and accelerationNewton's second and third lawsWeight, mass and gravitational field strengthReaction time, stopping distance and large decelerationsFactors affecting stopping distance and reaction time
Conservation of Energy
Waves
Light and the Electromagnetic Spectrum
Topic overviewProperties of electromagnetic wavesInvestigating refraction in glass blocksThe groups of the electromagnetic spectrumThe continuous spectrum, and what our eyes can detectHow radiation is generated, and why danger rises with frequencyHarmful effects of excessive exposure to radiationUses of electromagnetic radiation
Radioactivity
Topic overviewThe atom and the size of atomsIsotopes, atomic number and mass numberRelative masses and charges of subatomic particlesElectron orbits and energy levelsForming ions, and how the atomic model changedTypes of ionising radiationBackground radiation and detecting radioactivityAlpha, beta and gamma, and their penetrating powerBeta-minus and beta-plus decayEffects of decay on atomic number and mass numberBalancing nuclear equationsActivity and the becquerelHalf-life and the randomness of decayHalf-life calculationsThe dangers of ionising radiationSafety precautions, contamination and irradiation
Energy – Forces Doing Work
Topic overviewEnergy stores and energy transfer diagramsChanging a system's energy, and measuring work doneWork done and the energy changes it causesGravitational potential and kinetic energy calculationsDissipation and wasted energyPower as the rate of energy transferThe watt, and calculating efficiency
Forces and Their Effects
Electricity and Circuits
Topic overviewThe atom, and drawing circuit diagramsSeries and parallel circuitsPotential difference and the voltmeterEnergy transferred by moving chargeCurrent, charge and measuring currentResistance and the equation V = IRResistors in series and in parallelDesigning circuits to test componentsInvestigating resistance in circuitsCurrent-potential difference graphs for componentsLight-dependent resistors and thermistorsThe heating effect of an electric currentUses of the heating effect, and the equation E = IVtPower as energy transferred per secondCalculating electrical powerEnergy transfer in domestic devices, and power ratingsDirect and alternating currentAlternating current and the UK mains supplyLive and neutral wires, earthing and fusesFuses in the live wire, mains voltages and electrical dangers
Magnetism and the Motor Effect
Electromagnetic Induction
Particle Model
Topic overviewKinetic theory and differences in densityCalculating density, and investigating itChanges of state and internal energySpecific heat capacitySpecific latent heat and thermal insulationInvestigating the specific heat capacity of waterGas pressure and the motion of particlesAbsolute zero and the kelvin scale
Light and the Electromagnetic Spectrum
Investigating refraction in glass blocks
- 3 things to know
- Paper 5
Overview
Drawing round the block, marking the ray with crosses, measuring the angles of incidence and refraction from the normal, the variables involved, and the pattern of results.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
State which two angles are measured when refraction in a rectangular glass block is investigated.
Key term
State the independent and dependent variables when refraction in a rectangular glass block is investigated.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Describe how the outline of a glass block is used when refraction in the block is investigated.
Model answer
The block is placed on paper and its outline drawn, so the block can be lifted away and the ray path traced without losing the boundary positions.
- 2
Describe how the path of light through a glass block is recorded when refraction is investigated.
Model answer
Pencil crosses are placed on the incoming ray and on the ray leaving the block, then the block is removed and the crosses joined with a ruler.
- 3
State which two angles are measured when refraction in a rectangular glass block is investigated.
Model answer
The angle of incidence and the angle of refraction, both measured from the normal.
- 4
State how the normal is drawn when refraction in a glass block is investigated.
Model answer
It is drawn at right angles to the surface of the block, at the point where the ray enters.
- 5
State the independent and dependent variables when refraction in a rectangular glass block is investigated.
Model answer
The angle of incidence is changed and the angle of refraction is measured.
- 6
Name one variable that must be kept the same throughout an investigation of refraction in a glass block.
Model answer
The same block must be used, so the material and its thickness stay the same.
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