Particle model: past paper questions
Real questions on particle model
The newest 20 of 75 written questions. Open one to see it on the real paper.
- 0625/41 · May/June 2026 · Q5a[3]
The dust particles move in a random motion. Complete the sentences to explain the motion of the dust particles. Air molecules inside the box are very small and move freely. The air molecules Air molecules hit dust particles causing the dust particles also move and .
See it on the paper → - 0625/41 · May/June 2026 · Q5b[3]
The temperature of the air inside the box increases. State and explain, in terms of particles, the effect on the air pressure inside the box. explanation statement
See it on the paper → - 0625/41 · May/June 2026 · Q5c[1]
The air temperature inside the box is 296 K. temperature = °C Calculate the air temperature in °C.
See it on the paper → - 0625/43 · May/June 2026 · Q3a[3]
Explain how the particles of helium gas in the balloon exert a pressure on the inside of the balloon.
See it on the paper → - 0625/43 · May/June 2026 · Q3b(i)[2]
Calculate the volume of the helium gas at height h. (i) volume = m 3
See it on the paper → - 0625/43 · May/June 2026 · Q4b[2]
Describe, in terms of particles and their motion, two ways in which a gas differs from a liquid.
See it on the paper → - 0625/32 · February/March 2026 · Q4a[3]
Describe the arrangement, separation and motion of the particles in a solid.
See it on the paper → - 0625/32 · February/March 2026 · Q4b[3]
pollen grain invisible moving particles of water Figure 4.1 Describe and explain the motion of the pollen grain. (b) Figure 4.1 shows the path of a pollen grain in a drop of water. The pollen grain is a microscopic particle.
See it on the paper → - 0625/42 · February/March 2026 · Q5a[3]
Atmospheric pressure is 1.0 × 10 5 Pa. A volume of 1.02 m 3 of air at atmospheric pressure is pumped into a car tyre. The pressure of the air when it is inside the tyre is 2.6 × 10 5 Pa. Calculate the volume of the air when it is in the car tyre. volume = m 3
See it on the paper → - 0625/42 · February/March 2026 · Q5b(i)[3]
Describe the structure of a gas in terms of the separation, arrangement and motion of particles. separation arrangement motion
See it on the paper → - 0625/42 · February/March 2026 · Q5b(ii)[3]
Explain, in terms of particles, why the internal energy of the gas decreases when the gas is at a lower temperature.
See it on the paper → - 0625/43 · October/November 2025 · Q4b[2]
Fig. 4.2 shows part of a steel railway track. There are small gaps between sections of the rail. small gap section of rail Fig. 4.2 State why gaps are needed between the sections of rail. Explain your answer in terms of particles. statement explanation
See it on the paper → - 0625/32 · May/June 2025 · Q4a(i)[1]
The movement of the particles in a gas is
See it on the paper → - 0625/32 · May/June 2025 · Q4a(ii)[1]
The forces between the particles in a gas are
See it on the paper → - 0625/32 · May/June 2025 · Q4a(iii)[1]
The gas exerts a pressure because the moving gas particles
See it on the paper → - 0625/32 · May/June 2025 · Q4a(iv)[1]
As the temperature of a fixed volume of gas decreases, the pressure exerted by the gas
See it on the paper → - 0625/33 · May/June 2025 · Q4a(i)[1]
The movement of the particles in a gas is
See it on the paper → - 0625/33 · May/June 2025 · Q4a(ii)[1]
The forces between the particles in a gas are
See it on the paper → - 0625/33 · May/June 2025 · Q4a(iii)[1]
The gas exerts a pressure because the moving gas particles
See it on the paper → - 0625/33 · May/June 2025 · Q4a(iv)[1]
As the temperature of a fixed volume of gas decreases, the pressure exerted by the gas
See it on the paper →
What examiners said
Comprehensive responses • Most candidates were able to give comprehensive descriptions about the kinetic particle theory of matter and its predictions about the arrangement, separation and motion of particles in a solid. Limited responses • Some candidates confused the motion of particles in a solid with the motion of particles in a liquid.
— Examiner report, February/March 2026, 0625/32 Q4(a) (Cambridge)
Comprehensive responses • Many candidates were able to describe the motion of the pollen grains as random or give a suitable synonym such as Brownian motion. Many candidates used the kinetic particle theory of matter and its predictions about bombardment of larger particles by microscopic water molecules to explain the Brownian motion of the pollen grains. Limited responses • Some candidates conf...
— Examiner report, February/March 2026, 0625/32 Q4(b) (Cambridge)
Comprehensive responses • Some candidates were able to give a clear description of the separation, arrangement and motion of particles in a gas. • Responses focused on providing a succinct description of each named property. Limited responses • A few candidates confused the terms separation and arrangement of particles. • Some candidates gave vague answers such as particles are not touching or par...
— Examiner report, February/March 2026, 0625/42 Q5(b)(i) (Cambridge)
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