Cambridge Physics 0625 Paper 4 Revision Guide for May/June 2026

Cambridge’s Physics 0625 Paper 4 is a 1‑hour‑45‑minute, 80‑mark extended theory examination. Success requires more than memorising formulae; examiners reward logical reasoning, clear substitutions and correct units. This guide highlights the typical pitfalls and how to earn every possible mark.

Paper 4 covers the full syllabus but emphasises application. Examiner reports show that candidates often lose method marks by jumping straight to numeric answers without showing their substitutions. Marks are also lost for omitting units or incorrectly describing energy transfers. In temperature‑based problems, for instance, you must explain that internal energy decreases as kinetic energy falls when cooling.

To prepare effectively:

• Show every step: Write out algebraic rearrangements and substitutions before calculating the final value. Even if your arithmetic slips, clear working can secure method marks.

• Use correct units: Include units at each stage, especially when combining joules, newtons and metres. Examiners penalise answers without units.

• Explain energy transfer: When discussing heating and cooling, describe how internal and kinetic energies change; link your explanation to conservation of energy.

In the final weeks before the exam, practise full paper questions and check your work with the mark scheme. Focus on writing complete solutions, explaining assumptions and checking sign conventions. Download our Method Mark Blueprint to see model answers and learn how examiners allocate marks.