Most students don’t fail IGCSE Physics because they didn’t read enough notes. They fail because they read notes that were never mapped to what Cambridge actually tests — and then panic in the exam hall when a question doesn’t look like the “example” they memorised.
IGCSE Physics notes should cover the six official syllabus topics — motion, forces and energy; thermal physics; waves; electricity and magnetism; nuclear physics; and space physics — organised by Core and Extended content, with worked formulas and past-paper style questions, since Cambridge (syllabus 0625/0972) gives no formula sheet in the exam.
That last part surprises a lot of students. You’re expected to know every equation from memory, which changes how you should be taking notes in the first place — not as a wall of definitions, but as a working formula bank you can recall under pressure.
What Are IGCSE Physics Notes, and Why Generic Ones Fail
“Notes” for IGCSE Physics usually means one of two things: a condensed theory summary (what ZNotes and Save My Exams do well) or a topic-by-topic breakdown with practice questions attached (what Smart Exam Resources and similar sites sell as bundles). Both have their place, but neither works on its own.
A pure theory summary tells you what Newton’s second law is. It won’t train you to spot when a question wants F = ma versus when it wants you to combine it with momentum. A practice-question bank without solid theory behind it just means you’re guessing your way through mark schemes.
The notes that actually move a grade are the ones that sit between the two: concise enough to revise from repeatedly, but built around the command words and calculation styles examiners actually use.
The 0625 Syllabus at a Glance: Core vs Extended
Cambridge IGCSE Physics runs under two syllabus codes — 0625 and 0972 (9-1). The physics content is identical between them; the only difference is how the final grade is reported (A*–G versus 9–1). If your school has told you which one you’re sitting, the notes and past papers are interchangeable either way.
Within the syllabus, you’re placed on one of two tiers:
- Core — capped at a grade C (or grade 4), tested through Paper 1 and Paper 3
- Extended — Core content plus Supplement, capable of reaching A* (or grade 9), tested through Paper 2 and Paper 4
Every student, regardless of tier, also sits Paper 5 (Practical Test) or Paper 6 (Alternative to Practical).
Quick takeaway: if your notes don’t clearly separate Core material from Supplement material, you risk over-revising content you’ll never be examined on — or worse, under-revising the Supplement topics that carry the marks needed for a top grade.
What Changed in the 2023 Syllabus Revision
The 2023–2025 syllabus (which carries through to 2026–2028, confirmed unchanged by Cambridge) made two changes worth knowing if you’re using older notes: space physics became a compulsory topic rather than an optional extra, and digital electronics content was removed entirely. If a set of notes still has a “digital electronics” chapter or treats space physics as optional, it’s outdated — don’t revise from it.
How the Exam Papers Actually Work
This is the part most note collections skip, and it’s the biggest reason students walk into an exam having “revised the topic” but not the paper.
| Paper | Tier | Format | Weighting |
|---|---|---|---|
| Paper 1 | Core | 40 multiple-choice questions | 30% |
| Paper 2 | Extended | 40 multiple-choice questions | 30% |
| Paper 3 | Core | Short-answer and structured questions | 50% |
| Paper 4 | Extended | Short-answer and structured questions | 50% |
| Paper 5 | Both | Practical Test | 20% |
| Paper 6 | Both | Alternative to Practical | 20% |
Papers 1 and 2 reward speed and recognition — you need notes that let you recall a definition or equation in seconds, not paragraphs you have to reread. Papers 3 and 4 reward structured working — notes with fully worked calculation steps, not just final answers, pay off here. And Paper 6 is its own beast entirely.
Paper 6: The Alternative to Practical Nobody Prepares Well For
Most students revise theory and forget Paper 6 is a distinct skill: reading data tables, estimating uncertainty, describing experimental method, and drawing ray diagrams accurately. It’s not extra physics knowledge — it’s exam technique. Notes that only cover the six theory topics and ignore this paper leave a fifth of your grade unprepared for.
Topic-by-Topic Notes: All Six Syllabus Areas
1. Motion, Forces and Energy
This is the largest topic by mark allocation and the foundation everything else builds on. Core ideas: scalar vs vector quantities, distance-time and speed-time graphs, density (ρ = m/V), Hooke’s law, moments and equilibrium, momentum (p = mv) and its conservation, and work/energy/power.
Where students lose marks: confusing gradient on a speed-time graph (acceleration) with the area under it (distance), and forgetting that momentum conservation only holds when no external force acts on the system.
2. Thermal Physics
Covers the kinetic particle model, the three states of matter, Brownian motion, Boyle’s law, thermal expansion, and the three methods of heat transfer — conduction, convection, and radiation.
Where students lose marks: describing convection in solids (it can’t happen — no particle movement) and mixing up specific heat capacity with latent heat, which are tested with near-identical wording but different formulas.
3. Waves
Includes general wave properties (frequency, wavelength, amplitude), the electromagnetic spectrum, light — refraction, total internal reflection, and lenses — and sound.
Where students lose marks: ray diagrams that aren’t drawn with a ruler and correct angles (examiners mark construction, not just the final answer), and confusing refraction direction when light moves from a denser to a less dense medium.
4. Electricity and Magnetism
Covers current, voltage, resistance (V = IR), series and parallel circuits, electromagnetic induction, and transformers.
Where students lose marks: applying series-circuit current rules to parallel circuits, and getting transformer turns-ratio calculations backwards (step-up vs step-down).
5. Nuclear Physics
Covers atomic structure, isotopes, alpha/beta/gamma radiation and their properties, half-life calculations, and (Extended only) nuclear fission and fusion.
Where students lose marks: half-life questions where students calculate the number of half-lives elapsed correctly but then apply it to the wrong starting quantity.
6. Space Physics
The newest compulsory topic: the solar system, orbital motion, and the life cycle of stars.
Where students lose marks: treating this as a “light” topic and skipping it in revision, then losing easy marks on a section most competitors’ notes still under-cover.
The Formula Sheet Nobody Gives You
Unlike some other IGCSE sciences, Cambridge Physics candidates are not given a formula sheet in the exam. Every equation below needs to be memorised, not just recognised:
- Speed: v = d/t
- Acceleration: a = (v − u)/t
- Density: ρ = m/V
- Weight: W = mg
- Moment: M = F × d
- Momentum: p = mv
- Work done: W = F × d
- Power: P = W/t (or E/t)
- Pressure: P = F/A
- Wave speed: v = f × λ
- Charge: Q = It
- Voltage/current/resistance: V = IR
- Electrical power: P = VI
- Half-life: fraction remaining = (1/2)ⁿ, where n is the number of half-lives elapsed
Write these on a single page and test recall from memory weekly — not just recognition when you see them printed.
Free vs Paid Note Providers, Honestly Compared
Not every source is worth your time, and paying doesn’t automatically mean better. Here’s how the main options actually stack up:
| Provider | Cost | Best for | Watch out for |
|---|---|---|---|
| ZNotes | Free | Fast theory summaries, quick pre-exam review | Concise to the point of missing worked examples |
| Save My Exams | Free tier + paid | Structured, exam-board-aligned notes with practice questions | Best content often sits behind a subscription |
| Smart Exam Resources / Smart Edu Hub | Free preview + paid membership | Chapter-by-chapter PDFs mapped to mark-scheme vocabulary | Full syllabus coverage requires membership |
| IGCSE Pro | Free | Chatty, beginner-friendly explanations | Some sections marked as still “in progress” |
| Reddit r/IGCSE resource hub | Free | Community-uploaded topical notes, formula sheets, flashcards | Quality and accuracy vary — cross-check against the syllabus |
Honest take: there’s no single “best” source. The strongest approach is ZNotes or a free summary for quick recall, paired with a resource that gives full worked past-paper questions so you’re not just reading theory in isolation.
How to Actually Revise With These Notes (Not Just Read Them)
Rereading notes feels productive and teaches you almost nothing. What actually works:
- Summarise from memory first, then check. Close the notes, write what you remember about a topic, then compare against the original — the gaps you find are exactly what to revise.
- Turn every formula into a past-paper question. Don’t just memorise P = VI; find three past-paper questions that use it and solve them cold.
- Time yourself on Papers 1/2 style questions. Multiple-choice papers reward speed — practise under a clock, not untimed.
- Treat Paper 6 as its own revision block. Practise reading data tables and drawing ray diagrams separately from theory revision.
- Revisit space physics and nuclear physics deliberately. These get skipped disproportionately because they feel “smaller” — don’t let that translate into weaker marks.
Common Mistakes Students Make Across Every Topic
A few patterns show up regardless of which topic a student is weakest in: mixing up scalar and vector quantities in written answers, forgetting units on final answers (which costs marks even with correct working), copying a formula correctly but substituting the wrong value from a data table, and running out of time on Paper 3/4 because early questions weren’t paced against the mark allocation shown next to each part.
None of these are knowledge gaps — they’re habits. Fixing them is often worth more marks than learning new content in the final weeks before an exam.
Solid IGCSE Physics notes aren’t the ones with the most pages — they’re the ones organised the way Cambridge actually examines the subject: by tier, by paper, and by the formulas you’re expected to recall without a sheet in front of you. Build your revision around that structure, work through past papers against it, and the six topics stop feeling like six separate subjects to cram.
For IGCSE notes on other subjects, visit our home page.
FAQ Section
Is IGCSE Physics 0625 hard? It’s considered one of the more calculation-heavy IGCSE sciences, particularly at Extended tier. Difficulty depends heavily on comfort with algebra and unit conversions rather than raw content volume — students who practise past papers consistently tend to find it manageable.
What is the difference between IGCSE Physics 0625 and 0972 (9-1)? The physics content is identical. The only difference is the grading scale: 0625 reports A*–G, while 0972 reports grades 9–1. Notes and past papers work for either.
Do you get a formula sheet in the IGCSE Physics exam? No. Cambridge IGCSE Physics candidates must memorise all required equations; no formula sheet is provided in Papers 1–4.
What is Paper 6 in IGCSE Physics? Paper 6, the Alternative to Practical, tests experimental skills — reading data, describing methods, and drawing diagrams — without a live practical exam. It’s worth 20% and needs separate revision from theory content.
How many topics are in the IGCSE Physics syllabus? Six: motion, forces and energy; thermal physics; waves; electricity and magnetism; nuclear physics; and space physics.
What’s the difference between Core and Extended IGCSE Physics? Core content caps the achievable grade at a C (grade 4) and is tested via Papers 1 and 3. Extended includes Core plus Supplement content, tested via Papers 2 and 4, and can reach an A* (grade 9).
Are free IGCSE Physics notes good enough, or should I pay? Free sources like ZNotes cover theory well for quick review. If you need extensive worked past-paper practice mapped to mark-scheme wording, a paid resource can save time — but it isn’t strictly necessary to pass.
How should I revise IGCSE Physics in the final month before exams? Prioritise past papers over rereading notes, revise formulas from memory rather than recognition, and give space physics and nuclear physics dedicated time rather than leaving them until last.