Why six-mark questions are different
Most GCSE Physics questions test whether a student knows the right answer. Six-mark questions test something additional: whether a student can construct a coherent, evidence-based scientific explanation.
That's a different skill. And it's one that many capable students have never been explicitly taught.
The result is predictable. Students who understand the Physics write everything they know in one dense paragraph. The examiner can't follow it. Marks are lost — not because the knowledge wasn't there, but because it wasn't communicated in the way the mark scheme rewards.
What the examiner is actually marking
Six-mark questions are marked using a level-of-response mark scheme. This means the examiner isn't ticking individual facts — they're making a judgement about the overall quality of the response.
That judgement is based on three things:
- Relevance — does the answer address what the question is asking?
- Scientific accuracy — is the Physics correct and precisely stated?
- Logical sequencing — does the explanation flow in a way that demonstrates understanding?
Writing more doesn't automatically improve a response. Writing more relevantly, accurately and logically does.
AQA Evidence — 2025
AQA examiner reports consistently highlight that students who lose marks on six-mark questions typically demonstrate some relevant knowledge but fail to organise it into a coherent explanation. The structure of the response — not just the content — determines the level awarded.
The most common mistakes on six-mark questions
- Starting to write immediately without reading the question carefully enough to identify what type of response is needed
- Writing in one long paragraph with no logical sequence
- Including irrelevant information to fill space
- Using vague everyday language instead of precise scientific vocabulary
- Failing to link cause and effect clearly
- Not answering the specific command word — describing when asked to explain, or explaining when asked to evaluate
- Leaving the question blank because of uncertainty about where to start
The last point is worth highlighting separately. A blank six-mark answer scores zero. A structured attempt that includes some relevant Physics will almost always score something. Starting the answer — with a clear structure — is more important than knowing every detail.
Same knowledge. Different marks.
Here's the same six-mark question answered two ways. Both students understand the Physics. The difference is structure and precision.
"Explain how a step-up transformer increases voltage. (6 marks)"
⚠ Weak response
"A transformer has two coils. The electricity goes through the primary coil and creates a magnetic field. This then goes to the secondary coil and increases the voltage because it has more turns. Transformers are used in the National Grid to reduce energy loss."
Likely: Low marks
Vague language. Some relevant content but poorly sequenced. Cause-effect relationships not clearly stated.
✓ Stronger response
"An alternating current in the primary coil creates a changing magnetic field in the iron core. This changing magnetic field induces an alternating voltage in the secondary coil. Because the secondary coil has more turns than the primary coil, the induced voltage is greater. The ratio of turns determines the ratio of voltages."
Likely: Higher marks
Precise scientific language. Clear cause-effect chain. Logical sequence. Addresses the question directly.
Same Physics. Different structure. Different result. The stronger response doesn't contain more knowledge — it communicates that knowledge more effectively.
A repeatable structure for six-mark questions
Rather than starting with a blank page and hoping the right ideas emerge in the right order, students who perform consistently on six-mark questions use a structure before they write.
One framework Physics Decoded teaches is built around four stages. The exact approach differs depending on the question type — but the principle is the same: see the route before you write.
1
Make your Point
State the key scientific idea that directly answers the question. Don't build up to it — lead with it.
2
Add Evidence
Support your point with relevant scientific knowledge — a fact, a value, a relationship, or a mechanism.
3
Explain the link
Show why the evidence supports the point. This is where cause-and-effect relationships are made explicit.
4
Link back to the question
Connect your explanation back to what the question is asking. This ensures the answer remains relevant throughout.
This structure isn't a magic formula — and learning the four stages isn't the same as knowing how to apply them under exam conditions. But it provides a starting point that prevents the most common failure: writing everything you know in no particular order and hoping for the best.
What parents can do to help
Instead of asking "have you revised?" after a disappointing six-mark result, try asking questions that develop exam performance:
- Which command word was the question testing — explain, describe, or evaluate?
- Did the answer have a clear sequence, or was it a list of facts?
- Could you identify the cause-and-effect relationship in the answer?
- Did the answer use precise scientific vocabulary, or everyday language?
- Did you attempt it, or leave it blank?
Frequently asked questions
How long should a six-mark answer be?
There's no fixed word count. The mark scheme rewards quality of explanation, not length. A well-structured response of six or seven sentences will generally outperform a disorganised paragraph of twenty. Focus on precision and sequence rather than length.
Do bullet points work for six-mark answers?
Sometimes. For some question types, bullet points can help organise information clearly. For others — particularly explain and evaluate questions — continuous prose that shows the logical connection between ideas tends to score higher. The safest approach is to let the command word guide the format.
What's the difference between describe and explain?
Describe asks what happens. Explain asks why it happens. A describe answer lists observations or facts. An explain answer requires cause-and-effect reasoning — linking what happens to why it happens using scientific principles. Many students describe when asked to explain, and lose marks as a result.
Is it worth attempting a six-mark question if you're unsure?
Yes. A blank answer scores zero. A partial attempt that includes some relevant Physics will almost always score something. Even if the full explanation isn't there, stating the key scientific idea clearly and using precise vocabulary can earn marks.
How is Physics Decoded different from revision guides?
Revision guides teach more content. Physics Decoded teaches exam performance — specifically, the patterns that determine how marks are awarded across different question types. The two work together: content knowledge is necessary, but it isn't sufficient on its own.
About Physics Decoded
Physics Decoded is a coaching programme built around the Five Performance Patterns that determine how GCSE Physics marks are awarded. It works for both separate Physics and Combined Science students. Created by Paul Gold — Head of Science, NASM Performance Enhancement Specialist, and former professional tennis coach.
The programme doesn't teach more content. It teaches students how to use the knowledge they already have to perform in the exam.
The next live cohort is starting soon, with places strictly limited to a small group. Find out more about Physics Decoded Live →