← Combined Science syllabus

WalesCombined Science

Unit 6 Physics 2: Kinetic theory

3 dot points across 3 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

What causes gas pressure, and how does it change with temperature and volume?

Gas pressure in terms of particle collisions, and how pressure changes with temperature and with volume.
A focused answer to the WJEC GCSE Science Double Award Unit 6 topic on gases, covering how gas pressure is caused by particle collisions, and how the pressure of a gas changes with temperature and with volume.
9 min answer →

How does the particle model explain the three states of matter and changes of state?

The particle model of solids, liquids and gases, density, and changes of state as physical changes.
A focused answer to the WJEC GCSE Science Double Award Unit 6 topic on the particle model, covering the arrangement of particles in solids, liquids and gases, density, and changes of state as physical changes.
9 min answer →

What is specific heat capacity, and what happens to energy during a change of state?

Specific heat capacity and the equation for energy, internal energy, and the energy needed for a change of state.
A focused answer to the WJEC GCSE Science Double Award Unit 6 topic on heating, covering specific heat capacity and its equation, internal energy, and the energy needed during a change of state when the temperature stays constant.
9 min answer →