The short answer: most marks lost in O-Level Physics are not lost on the topic. They are lost on the command word — the verb at the start of the question, which SEAB defines precisely and most students read as decoration.
A student who writes a paragraph for a one-mark state question and a single line for a three-mark explain question has revised O-Level Physics perfectly well and will still come out several grades down. This is the most fixable problem in the subject, and almost nobody drills it.
You have probably watched the hours go in. The notes exist, the topics are known, and the grade will not move — and somewhere in the post-mortem your child says the sentence that should be a clue rather than an excuse: “I knew that one. I just wrote it wrong.” They are usually telling the truth.
Only about 15% of O-Level Physics marks reward recall
Start with how the paper is actually weighted, because it explains everything that follows.
The O-Level Physics syllabus (6091) splits the theory papers into two assessment objectives. Knowledge with Understanding is approximately 45% of the marks — with only about 15% allocated to recall. The other 55% is Handling Information and Solving Problems.
Read that again. Roughly one mark in seven across Papers 1 and 2 is available for remembering something. Everything else requires applying it, often to a situation the syllabus has never shown the student.
Yet almost all revision — notes, summaries, memorised definitions — targets that 15%. Students then meet the other 85% in the exam hall and conclude they did not study hard enough. They usually studied the wrong thing.
What SEAB actually means by “explain”
Here is where it gets specific. SEAB publishes a glossary of terms in the syllabus, and it is not vague. On explain:
normally implies that a definition should be given, together with some relevant comment on the significance or context of the term(s) concerned … The amount of supplementary comment intended should be interpreted in the light of the indicated mark value.
Two things follow, and students miss both.
First, an explain answer that contains no definition is incomplete before it has begun. Second — and this is the line almost nobody is taught — the mark value tells you how much to write. It is not a hint. The syllabus states outright that the amount of comment should be interpreted in light of it.
The nine O-Level Physics command words, and what each buys
These are SEAB’s own definitions, compressed. Every one of them appears in O-Level Physics papers.
- Define — “intended literally”. A formal statement or the defining equation with symbols identified. Nothing else earns anything.
- State — a concise answer with little or no supporting argument. Extra sentences cost time and earn zero.
- Describe — state in words the main points, with diagrams where appropriate; for a phenomenon, include the visual observations.
- Explain — definition plus relevant comment, sized to the mark value.
- Predict or deduce — explicitly not answerable by recall. The marks are for making a logical connection between pieces of information given in the question, sometimes from an earlier part of it.
- Suggest — either there is no unique answer, or the student is expected to apply general knowledge to a novel situation, “one that formally may not be in the syllabus”.
- Show — an algebraic deduction proving a given equation, with terms stated explicitly.
- Determine — the quantity cannot be measured directly; it comes from calculation.
- Measure — the quantity can be read directly off an instrument.
The pairs are where the marks go. Determine and measure are not synonyms. Neither are state and explain, or define and describe. A student who treats them as interchangeable is guessing at what the examiner wants on every structured question in the paper.
The two that cost the most
Suggest is the most misread word in O-Level Physics. Because it appears in an unfamiliar context, students assume they have hit something they were never taught — and freeze, or leave it blank. The syllabus says the opposite: suggest means novel by design. It is not a gap in their preparation; it is the question type doing its job. Knowing that is worth several marks a paper on its own.
Show is the other. When the answer is printed in the question, students work backwards to it and skip stating what their terms mean. The syllabus is explicit that the terms being used must be stated explicitly — that is the mark.
The part of the grade nobody rehearses
Paper 3, the practical, is 20% of the O-Level Physics grade — 1 h 50 min across two sections of 20 marks each. Within it, Planning carries 15%, with manipulation, presentation of data and analysis making up the other 85%.
Planning is the skill least likely to have been practised, because it is the one that cannot be done by rote: the student is asked to design an approach, not execute a given one. It is a small slice of the total, but it is reliably the slice left on the table.
What to do before the next O-Level Physics paper
This is narrow and unglamorous, which is why it works.
Take any O-Level Physics past paper the student has already done. Ignore the physics entirely. For each question, write down the command word and the mark value, then ask whether the answer they gave matches what that word requires. Most students find a pattern within twenty minutes — usually over-writing on state and under-writing on explain.
That exercise costs one session and does not require learning any new content. It is the highest-return hour available to anyone sitting O-Level Physics this year.
What we would tell you in person
If your child understands the topics but the O-Level Physics grade does not reflect it, the problem is rarely the physics. It is that they are answering a different question from the one on the paper. That is diagnosable in a single sitting, and fixable well inside a term — unlike the content, which is not.
The same habit carries forward: JC physics uses the same command vocabulary at higher stakes, and so does IP physics.
These are not marks your child has to go and earn. They are marks already earned and not collected, which is a far better position to be in than it feels.
If you would like a second opinion on where your child currently stands, that is what a trial lesson is for. We will tell you straight.
APMC Learning Centre teaches O-Level Physics and secondary science in Woodlands, in classes of no more than eight with two tutors in the room. If you are still choosing between pure and combined science, we have written about that too.
