Good Physics revision finds the exact skill that failed, fixes it with a fresh question and then checks it again later. Rereading pages does none of these things.
This page gives you a method built on your own marked work, and shows how the mistake log and retest queue keeps it organised.
What counts as a gap?
A gap is not a chapter title. It is a specific failure, such as “I read the gradient but forgot the units” or “I used mass where the formula needed force”.
Sort each lost mark into one of three types. Each type needs a different fix.
| Error type | What it looks like | Fix |
|---|---|---|
| Arithmetic | Right method, wrong number or unit conversion | Slow down, estimate first, check units |
| Interpretation | Wrong quantity read from a graph or diagram | Redraw the situation, label every quantity |
| Incomplete reasoning | Correct idea, missing link in the explanation | Write the chain: cause, mechanism, effect |
A worked example of a gap entry
A student marks this question: a 2.0 kg trolley is pulled by a 10 N force against 4 N friction; find its acceleration. They wrote a = 10 ÷ 2.0 = 5 m/s².
What went wrong: they used the applied force, not the resultant force.
Correct working: resultant = 10 − 4 = 6 N, and a = 6 ÷ 2.0 = 3.0 m/s².
Log entry: the type is interpretation, the skill is “resultant force before F = ma”, and the next action is one fresh question in three days. The retest could be a 5.0 kg crate pushed by 20 N against 5 N friction: resultant 15 N, so a = 15 ÷ 5.0 = 3.0 m/s².
Notice the retest has new numbers. If you only repeat the same question, you may be recalling the answer, not the method.
Check the scope before you revise
Revision time is precious, so spend the first ten minutes confirming what is in scope. Open the current syllabus from the Cambridge Physics page in the sources below and compare it with your notes. Your school or exam centre tells you which exam year and route apply, and our syllabus and exam-year navigator helps you write the questions to ask.
If a topic is marked as Supplement or Extended content in your syllabus and you are entered for the Core route, ask your teacher before spending weeks on it.
A simple weekly cycle
- Monday: pick two modules and do six mixed questions without notes.
- Tuesday: mark them and log every lost mark by error type.
- Thursday: retest the logged errors with fresh numbers.
- Weekend: one timed set that mixes modules, then update the log.
Check yourself
1. A student writes “weight = 4 kg”. Which error type is this, and why?
Show answer
Interpretation. Weight is a force measured in newtons, while kg is a unit of mass. The fix is to separate the two quantities, as explained in mass, weight and density.
2. You lost a mark for writing “the current is used up”. Which error type?
Show answer
Incomplete reasoning. Energy is transferred around the circuit, but the current is the same all the way round a series loop. The fix is to write the chain: charge carries energy, components transfer it.
3. Why should a retest use new numbers?
Show answer
Identical numbers test memory of the answer. New numbers test whether the method transfers.
Where to go next
Use the original practice hub for questions and explained answers, and the study route page if you have not planned your weeks yet. Words that keep tripping you up are collected in the Physics terminology guide.
If logging errors shows the same pattern every week, online one-to-one Physics tuition lets a teacher work on that pattern directly with you.