This exam focus covers Exam Focus within Gas Pressure & Temperature for GCSE Physics. Revise Gas Pressure & Temperature in Particle Model for GCSE Physics with 13 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 10 of 12 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 10 of 12
Practice
13 questions
Recall
30 flashcards
🎯 Exam Focus
Frequently Examined
Gas pressure is examined both as particle model explanations and as calculations:
- "Explain using the particle model" (3-4 marks): Must include speed of particles, frequency of collisions, and force of collisions. All three points needed for full marks.
- Absolute zero explanation (2 marks): State temperature, state that particles have minimum kinetic energy / theoretically zero pressure.
- Kelvin conversion (1 mark): T(K) = T(°C) + 273. Straightforward mark if you remember the formula.
- Higher only — gas law calculation (3 marks): Use p₁/T₁ = p₂/T₂ or p₁V₁ = p₂V₂ with Kelvin temperatures.
- Pressure in liquids (2 marks): Explain why pressure increases with depth — more liquid above exerts greater weight/force.