GCSE Combined Science covers all three sciences and counts as two GCSE grades — which surprises a lot of students expecting one subject and one result. If you are starting Combined Science, or deciding between it and Triple Science, here is exactly what it covers and how the two grades work.
- Result Two GCSE grades, not one
- Content split At least 30% each of Biology, Chemistry and Physics
- Set by DfE subject content — followed by AQA, Pearson Edexcel and OCR
- Also called AQA Trilogy, Edexcel Combined Science, OCR Gateway/21st Century
What Combined Science actually covers
All three sciences are examined, each making up at least 30% of the content:
- Biology — cell biology, transport systems in animals and plants, health and disease, coordination and control, photosynthesis and respiration, ecosystems, and inheritance, variation and evolution.
- Chemistry — atomic structure and the periodic table, structure and bonding, chemical changes, energy changes, rates of reaction, chemical analysis, industry, and Earth and atmospheric science.
- Physics — energy, forces and motion, waves, light and electromagnetic radiation, electricity, magnetism, the particle model of matter, and atomic structure.
Individual exam boards package this differently — AQA calls its version Trilogy, OCR offers both Gateway and 21st Century versions — but the DfE's subject content document sets the common scope every board must cover, so the core topics examined are the same nationally.
Practise all three sciences together. PassNova's Combined Science bank is 202 free questions across six topics, two per science, with every answer explained — no sign-up.
Combined Science vs Triple Science
The two routes cover the same three subjects but at different depths:
- Combined Science covers less depth per subject and results in two GCSEs.
- Triple (separate) Science covers each subject in full depth and results in three separate GCSEs — one each for Biology, Chemistry and Physics.
Combined Science remains a well-respected and common route into further science study, including A-Levels and science-related degrees — it is not a "lesser" option, just a broader one covering less ground per subject.
How it's assessed
Assessment is entirely by exam — there is no coursework or controlled assessment component in the current specifications. Because it counts as two GCSEs, your result is reported as a double grade (for example 6-6 or 7-6), reflecting your performance across the whole qualification split proportionally between the two awards.
How to revise for all three sciences at once
- Revise by science first, then mix. Build confidence in each subject separately using topic practice, then move to mixed sets — the real exam papers interleave topics within each science, so recognising which science a question belongs to under pressure is itself a skill.
- Don't neglect any one science to over-revise another. Because each science is at least 30% of the grade, a weak spot in one drags down the combined result more than students expect.
- Use timed mocks close to your exam date to build the stamina for switching between three subjects' worth of recall in one sitting.
Frequently asked questions
Does Combined Science count as one GCSE or two?
Two. Your result is reported as a double grade (such as 6-6), based on performance across all three sciences.
Is Combined Science accepted for the same courses as Triple Science?
For most further study and career routes, yes — Combined Science at grade 4 or above meets the science GCSE requirement for primary teaching, nursing and pharmacy technician entry. Some specific A-Level or degree routes (particularly separate sciences at A-Level) may prefer or require Triple Science, so check the entry requirements for your specific next step.
Do all exam boards test the same content?
The DfE sets a common subject-content framework every board must build against, so the core topics are the same nationally. Individual boards vary in question style and how they name their specifications.
One point of clarity: PassNova is a practice and revision site, not an exam board — book your GCSE through your school or, as a private candidate, an exam centre registered with AQA, Pearson Edexcel or OCR. Details here come from the DfE's Combined Science subject content, checked in September 2026.