Lesson 4.3.3.1

4.3.3.1 Particle motion in gases Quiz: AQA Physics, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.3.3.1, Particle motion in gases: 20 multiple choice questions for the AQA GCSE Physics (8463), Unit 3: Particle model of matter, written with Revision Ninja.

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The 20 questions

  1. How do the molecules of a gas move?

    • Constant random motion
    • Vibration only
    • Slow uniform speed
    • Fixed regular pattern

  2. What property of gas molecules is directly related to temperature?

    • Potential energy
    • Total volume
    • Average kinetic energy
    • Total mass

  3. If a gas temperature increases at constant volume, what happens to pressure?

    • It increases
    • It stays the same
    • It drops to zero
    • It decreases

  4. What causes the pressure of a gas inside a container?

    • Chemical reactions
    • Particle repulsions
    • Molecular wall collisions
    • Gravitational pull

  5. Why does heating a sealed gas container increase its internal pressure?

    • Molecules multiply
    • Molecules move faster
    • Molecules stop moving
    • Molecules become larger

  6. What describes the speeds of molecules in a gas?

    • Zero speed
    • All identical speeds
    • A range of speeds
    • Speed of light

  7. How do gas molecules move within a container?

    • Fixed vibrations
    • Regular patterns
    • Downward flow
    • Random motion

  8. What happens to the pressure of a fixed volume of gas if its temperature remains constant?

    • Drops to zero
    • Stays the same
    • Increases
    • Decreases

  9. Which factor directly increases gas pressure in a fixed volume?

    • Faster collisions
    • Lower temperature
    • Larger molecules
    • Fewer collisions

  10. What is the temperature of a gas directly related to?

    • Particle mass
    • Container volume
    • Total potential energy
    • Average kinetic energy

  11. Which action increases the average kinetic energy of gas molecules?

    • Compressing slowly
    • Cooling the gas
    • Expanding the volume
    • Heating the gas

  12. What does the particle model successfully explain about heated gases?

    • Pressure increases
    • Mass decreases
    • Gravity stops
    • Molecules merge

  13. Do gas molecules stop moving when cooled to room temperature?

    • Only at zero degrees
    • Yes
    • No
    • Only in metals

  14. What happens to gas molecules when temperature and pressure increase at constant volume?

    • Expand in size
    • Move slower
    • Move faster
    • Stop moving

  15. Which term describes the motion of gas molecules in a container?

    • Downward drift
    • Fixed vibration
    • Random motion
    • Circular flow

  16. Which description fits the average kinetic energy of gas molecules at higher temperature?

    • It is zero
    • It is greater
    • It is smaller
    • It is unchanged

  17. What property of a gas is directly related to the average kinetic energy of its molecules?

    • Density
    • Temperature
    • Mass
    • Volume

  18. What happens to gas pressure if its temperature increases while volume remains constant?

    • Drops to zero
    • Increases
    • Stays constant
    • Decreases

  19. What can be said about two different gases if they are at the exact same temperature?

    • Equal density
    • Equal molecular speed
    • Equal particle mass
    • Equal kinetic energy

  20. How do particles in a solid move compared to gases?

    • Flow randomly
    • Vibrate in place
    • Rotate constantly
    • Move freely

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