GCSE Physics — Particle Model of Matter

Led by Ludwig Boltzmann Simulacrum

Five tutorials covering AQA GCSE Physics §4.3 Particle Model of Matter — density and states of matter, internal energy and specific heat capacity, latent heat, particle motion in gases, and gas pressure and compression — taught by simulacra of the atomists and kinetic theorists who worked out what matter is made of and how it behaves.

1. Module 1 ○ Open

   Density and States of Matter

   Led by John Dalton Simulacrum

   The question

   Why is a block of iron denser than a block of wood, and why is the same water light as steam and heavy as ice?

   Outcome

   The student can apply the density equation, draw the particle arrangement for each state of matter, explain differences in density in terms of particle arrangement, describe all six changes of state with mass conservation, and carry out Required Practical 5 for regular solids, irregular solids, and liquids. (AQA 4.3.1.1, 4.3.1.2)

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2. Module 2 ○ Open

   Internal Energy and Heating

   Led by Amedeo Avogadro Simulacrum

   The question

   When you heat a substance, what actually happens to the atoms inside it?

   Outcome

   The student can define internal energy, explain what heating does at the particle level, apply ΔE = mcΔθ correctly, and connect the molecular picture to the numerical value of specific heat capacity. (AQA 4.3.2.1, 4.3.2.2)

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3. Module 3 ○ Open

   Latent Heat

   Led by Joseph Louis Gay-Lussac Simulacrum

   The question

   Why does boiling water stay at 100 °C no matter how much heat you put in, even though the kettle is still pouring energy into it?

   Outcome

   The student can apply E = mL, interpret heating and cooling graphs including plateaus at phase changes, distinguish specific heat capacity from specific latent heat, and perform an experiment to measure the latent heat of fusion of water. (AQA 4.3.2.3)

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4. Module 4 ○ Open

   Particle Motion in Gases

   Led by Ludwig Boltzmann Simulacrum

   The question

   What IS temperature, at the level of the particles that make up a gas?

   Outcome

   The student can explain the motion of gas molecules, relate gas temperature to the average kinetic energy of its molecules, and reason qualitatively about the pressure of a gas held at constant volume when the temperature changes. (AQA 4.3.3.1)

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5. Module 5 ○ Open

   Gas Pressure and Compression *(physics-only)*

   Led by Robert Boyle Simulacrum

   The question

   If you squeeze a sealed syringe, why does the air inside push back — and what happens to the temperature?

   Outcome

   The student can state Boyle's Law and apply pV = constant to both compression and expansion, use the particle model to explain qualitatively why reducing volume raises pressure, and (Higher Tier) explain how doing work on a gas raises its temperature. (AQA 4.3.3.2, 4.3.3.3)

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