IGCSE›Cambridge IGCSE Physics›Mind mapsParticle ModelCambridge IGCSE Physics: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsArrangementSolid: regular lattice, vibratingLiquid: random, close, sliding pastGas: random, far apart, fastDescribe arrangement, separation, motionTemperatureTemperature = average kinetic energyAbsolute zero = −273 °C = 0 KT (K)=θ (∘C)+273T\,(\text{K}) = \theta\,(^\circ\text{C}) + 273T(K)=θ(∘C)+27327 °C = 300 KGas pressureCaused by collisions with container wallsHeating → faster, harder collisionsCompression → more frequent collisionsMore particles → higher pressureParticle Modelmatter as moving particlesK°CPaBrownian motionRandom movement of microscopic particles in fluidCaused by unbalanced collisions from moleculesEvidence particles move randomlyFaster at higher temperatureFaster for smaller particlesForces and motionSolids: strong forces, low kinetic energyLiquids: moderate forces, can slideGases: weak forces, high kinetic energyGases compress easily; solids and liquids do notExam tipsTemperature is in particles, heat is in transitSay pollen moved by air moleculesExplain pressure by number and force of collisionsLink forces and energy for full marks