Cambridge IGCSE Co-ordinated Sciences 0654: the double award explained

IGCSE Co-ordinated Sciences papers

Cambridge says to enter Core if you have studied the Core content or are expected to get DD or below, and Extended if you have studied the Core and Supplement content and are expected to get CC or above. This is the 2025 to 2027 syllabus; Cambridge has published a new syllabus for 2028 and 2029.

Co-ordinated Sciences or Combined Science?

Co-ordinated adds topics that Combined leaves out, including coordination and response, inheritance, and variation and selection in biology, and nuclear physics. See our IGCSE Combined Science guide for the single award.

IGCSE Co-ordinated Sciences exam dates 2027

The June 2027 series runs from 26 April to 11 June 2027. Cambridge publishes a timetable for each zone, so check yours with your exams officer. November 2026 IGCSE results come out on 14 January 2027.

IGCSE Co-ordinated Sciences grade thresholds

Your three papers are weighted into a total out of 240. In June 2026, Cambridge set these thresholds:

Other versions of the papers had different thresholds (for 22, 42, 62 the A*A* was 169 and CC was 94), and they change every series.

What IGCSE Co-ordinated Sciences covers

• Biology (B1 to B19): organisms and cells, molecules and enzymes, nutrition, transport, disease, gas exchange, respiration, coordination and response, drugs, reproduction, inheritance, variation and selection, ecosystems and human influences.
• Chemistry (C1 to C12): states of matter, atoms and bonding, stoichiometry, electrochemistry, energetics, reactions, acids and salts, the Periodic Table, metals, the environment, organic chemistry and analysis.
• Physics (P1 to P6): motion, forces and energy, thermal physics, waves, electricity and magnetism, nuclear physics, and space physics.

Worked examples

Chemistry: gas volume

The syllabus takes the molar gas volume as 24 dm³ at room temperature and pressure. So 0.25 mol of carbon dioxide occupies:

Physics: half-life

A sample has an activity of 640 Bq and a half-life of 2 days. After 8 days, four half-lives have passed, so the activity is 640 ÷ 2⁴ = 40 Bq.

Biology: a test cross

A black mouse could be BB or Bb (black is dominant). Crossing it with a white mouse (bb) tests this: if any offspring are white, the black parent must be Bb, and you would expect about half black and half white.

Work out the odds of a trait from a cross in our Genetics & DNA course, then press Mark to check your answer in the course:

Use the daily paper as a short timed mock

Uni-Sine publishes a free daily paper for IGCSE Co-ordinated Sciences. Each is a short timed mock: 8 questions worth 25 to 35 marks, with a suggested 30 to 40 minutes, marked when you finish. It is not a full Cambridge paper, and the questions are original, not past papers.

• What it covers well: atomic structure and radiation, inheritance and evolution, quantitative chemistry, forces and momentum, electricity and magnetism, organic chemistry, energy changes and rates, cells and transport, and bioenergetics.
• What it does not cover: the practical skills of Papers 5 and 6, and the multiple choice format. Waves, ecology, coordination and space physics appear only occasionally.

For full papers under exam conditions, use Cambridge past papers from your teacher, and read our IGCSE mocks guide for when mocks happen and how to revise for them.

Common mistakes in IGCSE Co-ordinated Sciences

• Running out of time on the 2-hour theory paper. Practise full papers so you know your pace across all three sciences.
• Forgetting the molar gas volume condition. 24 dm³ applies at room temperature and pressure.
• Writing genetic crosses without gametes. Show parents, gametes, the Punnett square and the ratio.
• Treating the double award as two separate exams. Every paper mixes the three sciences.

Read next

International · IGCSEIGCSE Combined Science (0653): Papers, Dates, GradesCambridge IGCSE Combined Science 0653 explained: papers, Core or Extended, June 2027 dates, June 2026 thresholds and how it differs from Co-ordinated.