Cambridge IGCSE · Analysis & Prediction

2023 Cambridge IGCSE Sciences - Co-ordinated (Double) (0654) Past Paper: Analysis & Answers

A comprehensive analysis of the Cambridge IGCSE Co-ordinated Sciences (Double) 0654 October/November 2023 exam series, covering Core and Extended theory, MCQ, and practical papers.

Updated: Jun 13, 2026

AnalysisSample paper
Difficulty 3.4/5
Total marks
220
Duration
255 mins
Most tested
—

Paper breakdown

Paper 2 Multiple Choice (Extended): 40 marks · 45 minsPaper 4 Theory (Extended): 120 marks · 120 minsPaper 6 Alternative to Practical: 60 marks · 90 mins

Examiner insights

Official report

Common pitfalls

  • Failing to convert units (e.g., cm to m, or grams to kilograms) in formula calculations.
  • Using imprecise words like 'more collisions' rather than 'more frequent collisions' in rate-of-reaction explanations.
  • Confusing mitosis and meiosis when discussing the division of a zygote into an embryo.

Misconceptions

  • Believing that adding a resistor in parallel increases the total resistance of the circuit.
  • Thinking that non-metal oxides are basic and metal oxides are acidic.
  • Assuming that thermal energy transfer in vacuums can occur by convection or conduction.

Where marks are lost

  • Omitting charges on ions in dot-and-cross diagrams for sodium chloride.
  • Drawing incorrect paths for alpha particles in electric fields (failing to curve the path towards the negative plate).
  • Failing to show full steps and units in Physics calculation questions.

Estimated grade boundary

Updated: Jun 13, 2026

Source: Cambridge IGCSE grade thresholds (official)
GradeMarkPercentage
A*175/24073%
A146/24061%
B117/24049%
C89/24037%
D76/24032%
E64/24027%
Official grade boundaries published by Cambridge IGCSE grade thresholds (official).

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