What to know about SEAB Syllabus | G3 Combined Science K326 K327 K328: 2027 Practical Paper and Marks

What papers must a 2027 SEC G3 Combined Science candidate take, and does Combined Science have a practical examination? Yes. Under SEAB’s 2027 G3 Science syllabus for K326, K327 and K328, every candidate takes Paper 1 Multiple Choice, two relevant structured papers from Papers 2–4, and Paper 5 Practical. Paper 1 is one hour and worth 40 marks or 20%; each of the two chosen structured papers lasts 1 hour 15 minutes and contributes 65 marks or 32.5%; Paper 5 lasts 1 hour 30 minutes and carries 30 marks or 15%. The three subject codes describe which two science disciplines are examined—not three different kinds of practical assessment.

K326 is Science (Physics, Chemistry), taking Papers 1, 2, 3 and 5. K327 is Science (Physics, Biology), taking Papers 1, 2, 4 and 5. K328 is Science (Chemistry, Biology), taking Papers 1, 3, 4 and 5. This is different from G2 Combined Science K223–K225, whose published national assessment scheme consists of multiple-choice and structured components without a separate practical paper. A student should confirm the actual SEC G level and code before buying resources, assuming a laboratory exam exists or planning a timetable.

• 2027 K326: Physics and Chemistry; Papers 1, 2, 3 and 5.
• 2027 K327: Physics and Biology; Papers 1, 2, 4 and 5.
• 2027 K328: Chemistry and Biology; Papers 1, 3, 4 and 5.
• Paper 1: 40 multiple-choice questions, one hour, 20% overall, covering both registered sciences approximately equally.
• Two structured papers: 65 marks and 32.5% each, with a compulsory 55-mark Section A and a 10-mark choice in Section B.
• Paper 5: 30 marks, 1h30m, 15% overall, with practical tasks on both registered sciences.
• No mystery fifth science: all candidates take four papers, though the shared syllabus describes five paper numbers.
• Best first step: check the school entry and use the current SEAB PDF, then diagnose conceptual and experimental skills separately.

1. The first question is not ‘Combined or Pure?’ but ‘Which actual code?’

Parents often say that their child is taking ‘Combined Science’. That may be a useful shorthand in conversation, but it is not sufficiently precise for choosing national examination materials. G3 Science uses three codes, and the subject name explicitly identifies the two sciences involved. An examination paper for Chemistry may be relevant to K326 or K328 but not to K327. A Biology revision booklet may help K327 or K328 but cannot replace the Physics content in K326. Even a well-written book becomes inefficient when it targets the wrong examined disciplines.

SEAB’s 2027 G3 school-candidate directory links all three entries to the common syllabus. The earlier reference codes were 5086 for Physics–Chemistry, 5087 for Physics–Biology and 5088 for Chemistry–Biology. Those numbers can help identify older educational materials, but they do not establish that every old examination question exactly matches the first 2027 SEC. The current PDF should decide the actual syllabus and assessment.

Under Full Subject-Based Banding, a student’s Posting Group does not necessarily tell us the level of every subject they are taking. A pupil may have a mixed set of subjects under applicable school arrangements. Ask the school for the actual subject title and G level before calculating a study plan or discussing future JC and polytechnic eligibility. A G2 Science result and a G3 Science result follow different assessment specifications even when some scientific foundations overlap.

2. The 2027 G3 Science examination paper map

The percentages shown for Papers 2, 3 and 4 describe the contribution when that paper is one of the candidate’s chosen two. Candidates do not sit all three structured papers. For K326, the marks are 40 + 65 + 65 + 30 = 200. The weightings add to 20 + 32.5 + 32.5 + 15 = 100%. The same arithmetic applies to K327 and K328. This makes it easier for students to recognise what each component is worth, without mistaking the shared syllabus’s five paper labels for five compulsory examinations.

Time management should be informed by paper purpose. A one-hour MCQ tests many short decisions. A 1h15m structured paper requires the learner to show scientific reasoning and use evidence. The practical has distinct demands of safe technique, accurate observation, recording and evaluation. The total assessment cannot be prepared through one generic style of worksheet. Teach each mechanism and then integrate them.

3. Paper 1: forty MCQ questions across both sciences

Paper 1 contains 40 compulsory multiple-choice questions and is set at the same time for all K326, K327 and K328 candidates. The questions cover the two sciences in the candidate’s combination approximately equally. Students must therefore switch between different scientific models within one sitting. A K326 pupil may move from a question about forces to one about chemical reactions; a K328 student may move between particle ideas and living systems.

One useful strategy is to read the question’s conditions before looking for the familiar topic. A learner who sees the word ‘heat’ may assume every question involves temperature, when it may be asking about energy transfer. Another may recognise a biological organ without understanding how it works within a system. An MCQ can test a genuine misconception with very few words. Students should learn to justify why one answer fits and why the tempting alternatives fail.

For Chemistry combinations K326 and K328, SEAB includes the relevant Periodic Table and a named data sheet on some common metal hydroxide colours as part of Paper 1. A data sheet is helpful, but using it correctly is a skill: the student must identify the element, species or observation in context. For K327 without Chemistry, the same assumption about chemistry resources is irrelevant. Accurate code selection is therefore practical even at the level of what data is supplied.

4. Papers 2, 3 and 4: the structure is shared, the science is not

Each structured and free-response paper is 65 marks and lasts 1 hour 15 minutes. The format contains a compulsory Section A worth 55 marks, ending with a ten-mark question. Section B is worth ten marks and offers two alternatives; candidates answer one. The format repeats across Physics Paper 2, Chemistry Paper 3 and Biology Paper 4, but the examined scientific ideas differ.

A student should not assume the Section B choice means entire topics are optional during revision. Core syllabus knowledge remains important in Section A, and a candidate must be able to decide between two questions based on real understanding. Practise reading the alternatives, identifying the assessed process and choosing deliberately. Afterwards, work through the unchosen task during learning to prevent the choice mechanism from becoming an excuse to avoid difficult content.

The longer question at the end of Section A can reward a chain of reasoning rather than isolated recall. If a question gives experimental data, the learner may need to identify a relationship, make a calculation, explain the result and evaluate a limitation. Teach students to read what each sub-part adds to the task. Correct workings and precise units matter when numbers are involved, but an accurate numerical output is not always a complete scientific explanation.

5. Paper 5 practical: what the national document really requires

Paper 5 is a real practical test, worth 30 marks and 15% of the subject result. The examination lasts 1 hour 30 minutes. It contains one or two compulsory practical questions on each of the two examined sciences. A Physics practical question is common to the relevant Physics-containing combinations, and the Chemistry and Biology questions are likewise common where those disciplines are examined. The paper is set at the same time for all three combinations.

The syllabus expects candidates to handle apparatus and materials appropriately, carry out instructions, record observations, interpret data and evaluate procedures. One or more practical questions can ask the student to suggest a modification or extension that does not itself have to be executed. SEAB specifies that this modification or extension element may account for 10–20% of the practical-test marks depending on context. This makes experimental judgement part of the assessment rather than an afterthought.

Students must not bring unrestricted reference materials into the practical. The official syllabus states that reference materials other than the Chemistry Practical Notes are not permitted. Candidate instructions and the exact examination question govern any permitted notes. Parents should not assume that an ordinary exercise book or personal notes may be consulted because the work is practical rather than a written theory paper.

Safety is part of the learning. Students should perform relevant experiments under appropriate teacher supervision. They should not attempt hazardous household chemical tests, mains-electrical activities or improvised laboratory methods at home to imitate an examination. Understanding how to choose a controlled comparison and interpret a measurement can be practised in many safe ways, but the assessed laboratory techniques belong in properly supervised instruction.

6. The key difference from G2 Combined Science K223–K225

Parents often confuse G2 and G3 Science because both can involve two disciplines. But their published 2027 examination schemes differ. G2 Science K223–K225 uses four examined components selected from a common set of six MCQ and structured papers. Its national assessment scheme does not specify a separate hands-on practical paper, though students still need practical familiarity. G3 Combined Science K326–K328 explicitly includes Paper 5 as a hands-on examination contributing 15%.

The correct teaching implication is not that G2 students can ignore experiments or that G3 is only a laboratory course. Both levels require scientific concepts, evidence and application. G3 additionally assesses experimental execution and evaluation directly through Paper 5. Therefore, the choice of revision methods should follow the real level rather than a broad label such as ‘Combined Science’.

When a student is considering movement between levels, ask the school about the actual requirements and preparation. Conceptual learning, mathematical accuracy and experimental fluency may all need development. Do not promise that a student can switch solely because they completed one more workbook or attended a short holiday workshop.

7. Physics: interpreting quantities, forces and energy

In Physics, the student needs to connect mathematical expressions to real physical systems. An equation is useful only when the learner understands the quantities and assumptions involved. Take an original example: a trolley travels 24 metres in six seconds at a constant speed. Its speed is 24 ÷ 6 = 4 m/s. The arithmetic is modest, but the explanation must recognise that the calculation concerns distance over time and that the assumption of constant speed matters when making other predictions.

Another learner may be able to recite the law of conservation of energy but struggle to identify where energy is transferred in a simple system. Ask them to draw the system boundary and name the energy stores or transfers using the model appropriate to the current syllabus. A concise diagram and explanation can help more than a paragraph of memorised words. The aim is not to make every question lengthy; it is to make the relationships explicit.

In practical tasks, Physics students may need to take readings, decide which variables are controlled, plot a graph and evaluate discrepancies. A table’s appearance alone does not guarantee that a conclusion is valid. Check what was measured and whether the evidence fits the claim. Students who learn this habit can reason about unfamiliar experimental setups more confidently.

8. Chemistry: reactions, measurements and safety

Chemistry asks students to connect the properties of substances with their composition and behaviour. A learner who has memorised reaction words can still misunderstand what an observation shows. For example, if two solutions produce a visible precipitate, the response should describe the observation accurately and connect it to an appropriate chemical explanation. An answer that simply says ‘a reaction happened because the colour changed’ may miss the actual evidence needed.

SEAB’s practical guidance includes techniques such as titration, reaction-rate measurements, temperature readings, paper chromatography and qualitative analysis within the relevant syllabus. These are teacher-supervised laboratory activities. The purpose of preparation is not to reproduce hazardous procedures at home. It is to understand the role of controls, accurate volume readings, safe equipment handling and reporting of colour changes or other observations.

For written work, students should practise using an appropriate Periodic Table, interpreting chemical formulas and checking the quantities used in calculations. The Chemistry structured paper includes the relevant Periodic Table and data sheet, according to the published syllabus. The student must still identify which data are applicable and why. Chemical understanding cannot be delegated to a printed table.

9. Biology: explain a system rather than label a diagram

Biology involves living systems, cells, transport, nutrition, responses and other processes specified by the current syllabus. Labelling structures is useful, but students should also explain how those structures contribute to functions. A pupil may know that a plant has leaves and roots without explaining how water, light and other conditions affect growth. A good teaching question begins with a relationship: what changes, why might it change, and what evidence would help distinguish competing explanations?

Consider a hypothetical class investigation in which one group of plants receives different light and water conditions from another. If both variables differ, the student cannot confidently attribute a growth difference solely to light. That is experimental reasoning, not just Biology vocabulary. The learner should suggest a better controlled comparison and explain what could still limit the conclusions. A sound investigation respects living things and safety requirements.

The practical may involve observation and techniques appropriate to Biology. Students should be familiar with what accurate records look like, how measurements are taken and how an explanation relates to the actual evidence. Practise drawing a conclusion that is supported by data rather than inventing a perfect biological story from a single observation.

10. The three kinds of scientific ability tested

The K326–K328 syllabus identifies knowledge with understanding, handling information and solving problems, and experimental skills and investigations. For theory Papers 1–4, the first two areas each account for approximately half the marks, while experimental objectives are directly assessed through Paper 5. These are broad assessment aims, not guarantees of particular future questions.

Knowledge includes correct concepts, vocabulary, methods and scientific phenomena. Handling information requires translating, analysing and interpreting data, making reasonable predictions and applying concepts to an unfamiliar situation. Practical skill involves selecting apparatus, carrying out techniques, observing, measuring and evaluating methods. A student can be strong in one area yet need help in another. The teaching should not treat every wrong answer as lack of factual memory.

The bigger educational aim is to understand Science as an evidence-based activity. A model is useful because it explains observations and generates testable expectations. It has conditions and limits. When new evidence conflicts with a prediction, a thoughtful student investigates rather than changing the results to fit a preferred answer. These habits are valuable in everyday decisions about health information, technology, energy and the environment.

11. Read graphs, tables and units without guessing

A data-response question may present quantities, trends or an unfamiliar experimental context. Start by identifying the measured variables, units and any conditions. A graph whose horizontal axis represents time is not interchangeable with one representing distance. A rising line may indicate an increase in a quantity, but the interpretation depends on the scales and model. Teach students to describe what the evidence shows before offering an explanation.

For an original example, a student records temperatures of 25°C, 28°C, 31°C and 34°C at four equally spaced readings. The table shows an increasing temperature over the observed interval. But without knowing the time interval or experimental conditions, one cannot safely infer the heating mechanism or a universal rate. A careful answer states the trend and identifies any information needed for a stronger conclusion.

Scientific numeracy also involves units. A speed of 5 m/s is not the same as 5 km/h; a volume of 20 cm³ should not be written as 20 dm³. If a calculation involves a change in temperature, describe the relevant difference and measurement assumptions. Careful units and labels are not cosmetic marks: they protect the scientific meaning.

12. The practical extension question: propose a justified improvement

A modification question is sometimes misunderstood as an invitation to invent an elaborate new experiment. Often a useful improvement is modest and targeted. If an investigation’s measurement uncertainty is large because a scale is difficult to read, a student may propose a more suitable instrument or a clearer procedure and explain how it reduces error. If a comparison is confounded because two variables change together, the learner can suggest holding one constant.

However, an answer should not claim that repeating an experiment automatically eliminates systematic error. Repetition can improve confidence about random variation, but a consistently miscalibrated instrument can remain biased. Likewise, adding more equipment does not necessarily improve validity if the research question is still unclear. Teach students to match the proposed change to the specific limitation.

In the national practical, candidates may be asked to describe a modification or extension without executing it. This is an opportunity to assess scientific judgement. A good response names the change, explains why it matters and indicates what could be measured or compared. Avoid unsafe or unapproved procedures; actual practical work must follow the centre’s instructions.

13. Are older 5086, 5087 and 5088 papers useful?

They can be useful when their content and skills match the current 2027 G3 syllabus. The older reference codes help connect resources, but students should not assume every old practical format, data sheet or topic scope is automatically identical. Compare the exercises with the current K326/K327/K328 document, especially the assessed learning outcomes and examination instructions. A past question may be an excellent way to understand an underlying principle without being a faithful copy of the 2027 paper’s arrangement.

Use a small resource audit: correct code, correct disciplines, topic in current scope, task type, level of difficulty and source year. Mark material as directly aligned, useful background or unverified. This is especially important when using old school prelim papers, which reflect a school’s teaching choices and may be harder or broader than the national syllabus. Extra challenge can be useful but should follow mastery of the essentials.

The SEAB specimen-paper column is not an invitation to invent an unofficial ‘2027 prediction’. It is a directory of authentic resources for revised syllabuses where provided. Teachers and families should keep official and original teaching examples clearly distinguished, and should not distribute copyrighted past papers without appropriate rights.

14. Ten common errors and how to correct them

Wrong combination: studying Biology for K326. Wrong G level: assuming the G2 science practical format applies to G3. Wrong number of papers: counting the five labels as five compulsory papers instead of four. Wrong weighting: overlooking the 15% practical. Wrong Section B strategy: answering both alternatives rather than one. Ignoring data sheets: failing to learn what their information means.

Memorising only facts: struggling with unfamiliar evidence. Using a calculator without units: generating numbers that do not answer the question. Unsafe home practicals: confusing unsupervised activity with assessed laboratory competence. Writing unsupported practical conclusions: turning an observation into a claim not justified by the data. Each error calls for a specific correction rather than a general instruction to practise more.

15. Three illustrative families and their different needs

Case one: a K327 pupil studies the wrong textbook

A student’s book is labelled ‘Combined Science 2027’, but much of it covers Chemistry. The pupil is entered for K327 Physics–Biology and begins to worry that the examination contains unfamiliar Chemistry chapters. Checking the SEAB paper map resolves the problem: Papers 1, 2, 4 and 5 are relevant. The family selects Physics and Biology resources, then uses the current syllabus to identify the specific topics and skills. The child’s anxiety falls because the work has become accurate.

Case two: strong theory, weak practical confidence

Another pupil scores well on MCQ but feels uncertain about apparatus and recording observations. The teacher gives a small number of supervised practical tasks that emphasise correct procedure, safe handling, precise readings and evaluation. The learner keeps a brief record of recurring difficulties and practises explaining the choices behind measurements. The result is more meaningful than copying more theory notes when the first weak link is experimental technique.

Case three: accurate measurements, unsupported conclusions

A student completes a school practical neatly but concludes that one factor caused the observed outcome even though several conditions changed. A teacher asks them to identify which variables were controlled, what could be measured again and which alternative explanation remains. The pupil learns that scientific care is not only about tidy tables; it also means deciding what the evidence actually permits one to conclude.

16. Four weeks of preparation that match the real papers

Week 1 — verify and diagnose

Confirm the actual G3 Science code and download the syllabus. Make a paper map for MCQ, the relevant two structured papers and Paper 5. Give short diagnostics in both disciplines, including one data or experimental-reasoning task. Record whether the main issue is missing content, selecting an explanation, units, graph interpretation or practical technique. Do not assign an entire high-stakes paper as the first lesson.

Week 2 — strengthen core understanding

Teach one recurring weak concept per discipline, with an explanation and a worked example. Follow it with an unfamiliar attempt and a delayed retry. For Physics, use appropriate models and units; for Chemistry, connect reactions to evidence; for Biology, link structure to function. The child should be able to explain why a method or claim is suitable, not merely recognise a memorised answer.

Week 3 — supervised practical and structured reasoning

Use the school’s approved laboratory environment to practise accurate observations, safe procedures and evaluation. In parallel, answer a short structured task requiring a clear scientific explanation. Discuss how the practical evidence supports or limits a conclusion. The teacher should address misconceptions before increasing the workload. A student who understands their first error is more likely to improve independently.

Week 4 — mixed-paper transfer

Use new MCQ, one structured question in each examined discipline, and an appropriate practical-data challenge. Introduce time constraints once the student can work accurately. Compare with Week 1 and reset the priorities. Keep learning sustainable with ordinary school responsibilities and rest. The aim is to develop an adaptable scientist, not simply a faster worksheet-completion machine.

17. Frequently asked questions

What is K326 in 2027 SEC?

G3 Science (Physics, Chemistry). Candidates take Paper 1, Paper 2 Physics, Paper 3 Chemistry and Paper 5 Practical.

What is K327?

G3 Science (Physics, Biology), taking Papers 1, 2, 4 and 5.

What is K328?

G3 Science (Chemistry, Biology), taking Papers 1, 3, 4 and 5.

Does G3 Combined Science have a practical exam?

Yes. Paper 5 is a 1h30m practical worth 30 marks and 15% of the overall result, covering the two sciences in the candidate’s combination.

How many MCQ questions are there?

Paper 1 has 40 compulsory questions in one hour and is worth 20%.

Is Paper 1 the same for every combination?

It is set at the same time, but the content covers each candidate’s two registered sciences. K326, K327 and K328 do not study the same pair of disciplines.

Can I choose questions in the structured papers?

Section A is compulsory for each relevant 65-mark structured paper. Section B offers two ten-mark alternatives, and candidates answer one.

Does the Practical include both sciences?

Yes. SEAB specifies one or two compulsory questions for each of the two sciences in the candidate’s combination.

Are reference notes allowed in Paper 5?

SEAB specifies that reference material other than the Chemistry Practical Notes is not permitted. Follow the official candidate and centre instructions.

Why does G2 Combined Science not have the same practical paper?

G2 and G3 use different examination schemes. The current G2 assessment does not list a separate hands-on practical component, whereas G3 includes Paper 5. Both require scientific and practical understanding.

Which science combination is best for JC?

The answer depends on the JC’s actual subject prerequisites, the student’s examined levels and grades, and their interests. Do not assume that one G3 Combined Science code guarantees a particular H2 subject allocation.

Can older papers still help?

Yes, where their content and skills align with the 2027 syllabus. Verify the exact combination, format and learning purpose, and do not describe an older resource as an official 2027 specimen without evidence.

18. Official source and further reading

Official: SEAB 2027 G3 Combined Science K326/K327/K328 syllabus and 2027 G3 school-candidate syllabus directory, checked 6 November 2026. For a specific practical date, reporting arrangements or approved calculator, consult the later official candidate instructions.

Related eduKate: G2 Combined Science K223/K224/K225 paper combinations; science practical differences by level; 2027 SEC Science family guide; and Physics prerequisites for later JC choices. This article’s calculation and experimental examples are original teaching illustrations, not SEAB specimen questions.

Good science study moves from knowing a concept to using it accurately, gathering evidence and evaluating a result. The examination paper map makes the destination clear. Patient, targeted teaching develops the understanding needed to reach it.