Particle Model of Matter Exam Questions
Questions on density, states of matter, changes of state, internal energy, particle motion, specific latent heat, and gas pressure and temperature. Download free past paper questions organised by topic with mark schemes.
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Frequently Asked Questions
How do you calculate density GCSE?
Density = mass ÷ volume (ρ = m/V). Units: kg/m³ or g/cm³. Solids are usually denser than liquids, which are denser than gases.
What is internal energy GCSE Physics?
Internal energy = kinetic energy of particles + potential energy of particles. Heating increases internal energy. During a change of state, potential energy changes but kinetic energy (temperature) stays constant.
What is specific latent heat?
The energy needed to change the state of 1 kg of substance without changing temperature. E = mL where L = specific latent heat (J/kg). Latent heat of fusion (melting) or vaporisation (boiling).
Is gas pressure Triple Science only?
Yes, detailed gas pressure calculations (pV = constant for fixed mass at constant temperature) are Triple Science only. Combined Science students need basic understanding of pressure in gases.
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