Lesson 6.3.2.1

6.3.2.1 Internal energy Quiz: AQA Combined Science, Unit 20

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 6.3.2.1, Internal energy: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 20: Particle model of matter, written with Revision Ninja.

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The 20 questions

  1. Internal energy is the total kinetic and which other energy of particles?

    • Potential energy
    • Nuclear energy
    • Chemical energy
    • Elastic energy

  2. Inside a system, where is internal energy stored?

    • The empty space
    • The particles
    • The whole container
    • The surroundings

  3. What effect does heating have on the internal energy of a system?

    • It becomes zero
    • It increases
    • It decreases
    • It stays constant

  4. Heating a system raises its temperature or produces what other outcome?

    • Change of state
    • Chemical reaction
    • Mass reduction
    • Nuclear fission

  5. Which particles' energy makes up the internal energy of a system?

    • Only nuclei
    • Atoms and molecules
    • Only electrons
    • Only photons

  6. What causes the potential energy component of internal energy in particles?

    • Particle speed
    • Interparticle forces
    • External pressure
    • Random motion

  7. Which action will increase the internal energy of a gas?

    • Cooling the container
    • Insulating completely
    • Heating the container
    • Freezing the gas

  8. Water in a kettle heats from 20 degrees C to 80 degrees C. What happens to the internal energy of the water?

    • It increases.
    • It becomes zero.
    • It decreases.
    • It stays constant.

  9. A block has 50 J of kinetic energy and 20 J of potential energy from its particles. What is its internal energy?

    • 1000 J
    • 30 J
    • 70 J
    • 50 J

  10. Which process transfers energy to a system without changing its temperature?

    • Radiation emission
    • Cooling down
    • Changing state
    • Thermal expansion

  11. Internal energy depends on the energy of what components of a system?

    • Its bulk motion
    • Its external speed
    • Its total height
    • Its particles

  12. When ice at 0 degrees Celsius melts, which quantity increases?

    • Temperature
    • Internal energy
    • External volume
    • Particle mass

  13. Two identical blocks are at the same temperature, but one has twice the mass. Which has more internal energy?

    • They are equal
    • The smaller block
    • The larger block
    • Neither has any

  14. A system gains 500 J of thermal energy with no work done. How does its internal energy change?

    • Increases by 500 J
    • Increases by 250 J
    • Stays unchanged
    • Decreases by 500 J

  15. As a hot cup of tea cools in a room, what happens to its internal energy?

    • It stays constant
    • It decreases
    • It increases
    • It doubles

  16. Heating a sealed container of gas increases its temperature by raising what particle property?

    • Total mass
    • Particle size
    • Average kinetic energy
    • Chemical bonding

  17. Energy supplied to a boiling liquid without changing its temperature is stored as what?

    • Kinetic energy
    • Internal energy
    • Chemical energy
    • Gravitational energy

  18. Why does heating a solid increase its internal energy?

    • Particles vibrate more
    • Particles slow down
    • Mass increases
    • Volume decreases

  19. A system has an internal energy of 400 J and loses 150 J of energy to its surroundings. What is its new internal energy?

    • 550 J
    • 250 J
    • 150 J
    • 400 J

  20. Which action does not change a system's internal energy?

    • Cooling
    • Moving steadily
    • Compressing
    • Heating

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