Overall Exam Verdict

The Cambridge IGCSE Co-ordinated Sciences (0654) Summer 2026 series presents a fair, balanced, and standard-calibrated assessment across the three natural sciences. While fundamental recall questions remain accessible across Core and Extended tiers, Paper 42 and Practical Papers 52/62 demand precise quantitative manipulations, rigorous graph interpretation, and meticulous scientific diction.

Where the Marks Were Won and Lost

  • Biology: Candidates secured solid foundation marks on cell structures and hormone definitions (such as insulin and glucagon in blood glucose regulation). However, marks were dropped in explaining negative feedback loops dynamically and misidentifying cellular organelles involved in selective breeding and reproduction.
  • Chemistry: High scoring was evident in standard balancing of chemical equations and interpreting rate graphs. Marks were forfeited when students neglected to state 'only' in the definition of hydrocarbons, confused state symbols, or omitted collision frequency versus activation energy in collision theory explanations.
  • Physics: Mathematical problem solving was prominent. Students performed strongly in straightforward formula recall (such as \(E = VIt\) and \(v = \frac{d}{t}\)), but struggled in multi-step questions, such as resolving combined parallel-series resistor networks and computing orbital radius and wave transit times from orbital period data.

Common Examiner Traps & Key Pitfalls

A persistent trap observed across scripts is imprecise comparative phrasing. In questions requiring descriptions of trends (e.g., rate changes or kinetic energy), stating that particles move 'fast' rather than 'faster' forfeits marks. In physics circuit diagrams and ray optics, missing arrows on refracted rays or incorrect circuit component symbols cost easy marks.

High-ROI Revision Strategy

Prioritise high-yield integrative units: Motion, Forces and Energy, Electricity & Magnetism, Organic Chemistry, and Coordination & Response. Mastering qualitative test tables (anions, cations, and gases) guarantees a rapid 10–12 marks across theory and alternative-to-practical papers.