IGCSE Physics 0625 with AI in 2026: A Cambridge Syllabus-Specific Guide

Audience: IGCSE Physics students (Cambridge 0625), parents at international schools, and physics teachers building targeted remediation.

Hook: Cambridge IGCSE Physics (0625) is the most-misrevised IGCSE science subject — students revise GCSE Combined, Edexcel International 4PH1, or Cambridge 0972, then wonder why they plateau at a C. The mark scheme, command words, and graph-skill expectations are not interchangeable.

Tone: Syllabus-aware, examiner-grade, anti-jargon. For students who already know what velocity is.

Word count target: 1,800–2,200

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Intro — Why 0625-Specific Revision Matters

If you google "IGCSE Physics AI tutor" you get a mix of GCSE Combined, GCSE Physics (UK), Cambridge 0625, Cambridge 0972 (the parallel 9-1 version), and Edexcel International 4PH1 answers. The mark schemes are not interchangeable. The command words are not interchangeable. The grade boundaries are not interchangeable.

Cambridge IGCSE Physics (0625) has its own quirks:

• Grading A–G* (not 9–1). 0625 is the legacy A*–G version; 0972 is the parallel 9-1 version taught in some UK-international schools. Same content, different grade boundaries and tier structure.
• Two tiers: Core (grades C–G) and Extended (grades A*–C). Most international schools sit Extended because parents want A*–C.
• Three papers: Paper 2 (MCQ, 45 min, 40 marks), Paper 4 (theory, 1h 15m, 80 marks), Paper 6 (alternative to practical, 1h, 60 marks). Some schools sit Paper 5 instead of Paper 6 — confirm with your exam officer.
• Three topic groups instead of the 9-group GCSE Combined layout: General Physics (heaviest), Electricity & Magnetism, and Atomic Physics. Cambridge collapsed many sub-topics into General Physics (motion + forces + energy + waves + thermal all sit together).
• Graph skills and unit conversions carry disproportionate marks in Paper 4. Cambridge marks slope-of-line and area-under-curve interpretation as a separate skill from the underlying physics — most physics tutors mark them together. A 0625-aware tutor marks them apart.

If your AI tutor is giving you GCSE Combined answers, the topic order is wrong, the graph-skill weighting is off, and the mark-scheme treatment of "describe and explain" vs "state" command words is broken. You will plateau at a C.

The rest of this post is a 0625-specific workflow: which topic groups are hardest, how to revise the practicals with AI, and how to use a syllabus-aware tutor to actually climb a grade.

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The 3 Topic Groups That Catch Students Out

Cambridge 0625 Physics groups the syllabus into 3 sections. Every question in Paper 4 maps to one of these. The order is fixed, so a structured AI tutor can drill by group.

Topic 1 — General Physics

The heaviest topic group — General Physics carries roughly 50% of Paper 4 marks. It bundles motion, forces, momentum, energy, work, power, pressure, thermal physics, thermal properties, waves (including light and sound), and the electromagnetic spectrum. Most students hit a wall here not because the physics is hard, but because the math skills (graph interpretation, unit conversion, rearranging formulas) are marked as their own marks.

Examiner traps in motion and forces:

• Confusing velocity (vector, m/s, with direction) with speed (scalar, m/s, no direction). Cambridge marks direction on every velocity answer; lose direction = lose 1 mark.
• Misapplying Newton's Second Law: F = ma is for the resultant force, not a single force. A 0625-aware tutor will mark "the resultant force is 12 N" and deduct a mark if you wrote "the force is 12 N."
• Confusing mass (kg, scalar) with weight (N, vector). Cambridge marks weight as a force with direction; "weight = 60 kg" is a guaranteed 0-mark answer.
• Treating momentum (kg m/s, vector) as a scalar. Momentum conservation questions require direction.
• Drawing free-body diagrams with the wrong number of arrows. If a block sits on a slope, there are exactly 3 forces (weight, normal, friction) — adding "air resistance" when none is given loses a mark.

Examiner traps in energy, work, and power:

• Confusing work done (J = N × m) with energy transferred (J). They are numerically equal but the mark scheme labels them differently in different question stems.
• Misapplying gravitational potential energy (Ep = mgh) — g = 9.8 m/s² in Cambridge 0625 (not 10, not 9.81). A 0625-aware tutor marks this.
• Confusing power (W = J/s = rate of energy transfer) with energy (J). Cambridge marks the unit; wrong unit = 0 marks even if the number is correct.
• Treating efficiency as a percentage of input power rather than output ÷ input. The mark scheme always asks for efficiency as a decimal or percentage, with the formula stated.

Examiner traps in thermal physics:

• Confusing heat (informal, not a Cambridge term) with thermal energy (J, the formal term) and temperature (K or °C, a separate quantity).
• Misreading specific heat capacity (J/(kg·K)) — the units contain both mass AND temperature change. Cambridge marks the full unit; missing either = lose 1 mark.
• Confusing specific latent heat of fusion (melting) vs vaporisation (boiling). Different questions, different formulas, different marks.

Examiner traps in waves:

• Confusing transverse (e.g. light, waves on a string) with longitudinal (e.g. sound). Cambridge marks "transverse or longitudinal" as a 1-mark question; wrong = 0.
• Misapplying v = f × λ — forgetting to convert kHz to Hz, or cm to m. Cambridge marks the unit; mixed units = 0.
• Confusing the electromagnetic spectrum order (radio, micro, IR, visible, UV, X-ray, gamma) — Cambridge marks this as a memorised sequence with the property that wavelength decreases and frequency increases as you go from radio to gamma.

AI tutor drill: ask "A wave has frequency 250 kHz and wavelength 1.2 km. Calculate its speed in m/s." If the AI tutor does not convert kHz → Hz and km → m BEFORE multiplying, it is not 0625-aware. A 0625-aware tutor will walk through both conversions and mark each as 1 mark.

Topic 2 — Electricity and Magnetism

The second-heaviest topic group — Electricity & Magnetism carries roughly 40% of Paper 4 marks. It covers simple electrical phenomena, electrical quantities, electric circuits, digital electronics, electromagnetic effects, and the cathode-ray oscilloscope. Most students plateau here because they memorise formulas without understanding series vs parallel circuit behaviour.

Examiner traps in electrical quantities:

• Confusing current (A, measured with an ammeter, IN SERIES) with potential difference / voltage (V, measured with a voltmeter, IN PARALLEL). Cambridge marks the instrument AND the connection type.
• Misapplying V = IR — rearranging it incorrectly is a 1-mark loss, but the units are what trip students: V in volts, I in amps, R in ohms. Mixed units = 0 marks.
• Confusing electromotive force (e.m.f.) with potential difference (p.d.). e.m.f. is the energy supplied per unit charge by a source; p.d. is the energy transferred per unit charge across a component. Same units (V), different definitions, different marks.
• Misreading resistance from a V/I graph — Cambridge marks the graph interpretation as a separate skill from the calculation.

Examiner traps in circuits:

• Forgetting that series circuits share current and split voltage, while parallel circuits split current and share voltage. Cambridge marks "the current through R1 is X" with direction.
• Misapplying resistors in series (Rtotal = R1 + R2 + …) vs resistors in parallel (1/Rtotal = 1/R1 + 1/R2 + …). Most students get series right; parallel is where they plateau.
• Confusing power dissipation (P = IV = I²R = V²/R) — choosing the wrong form for the data given. Cambridge marks the chosen formula as 1 mark before the calculation.

Examiner traps in electromagnetic effects:

• Drawing magnetic field lines around a solenoid in the wrong direction. Cambridge marks "from N to S outside the magnet" and "from S to N inside the magnet."
• Confusing the left-hand rule (motor effect, Fleming's) with the right-hand rule (generator effect / induced current). Cambridge marks the rule explicitly in the answer.
• Misapplying F = BIL (force on a current-carrying conductor in a magnetic field) — forgetting that the force is zero when the wire is parallel to the field.

Examiner traps in the cathode-ray oscilloscope (CRO):

• Misreading time/div and volts/div settings on the CRO screen. Cambridge marks this as a 2-mark calculation.
• Confusing amplitude (peak height, volts/div) with period (one full cycle, time/div). Different readings, different marks.

AI tutor drill: ask "A 6 V battery is connected to two resistors in series, 4 Ω and 8 Ω. Calculate (a) the total resistance, (b) the current, (c) the voltage across the 8 Ω resistor." If the AI tutor uses V=IR only after computing Rtotal = 12 Ω (not 2 Ω from some wrong parallel rule), it is 0625-aware.

Topic 3 — Atomic Physics

The lightest topic group — Atomic Physics carries roughly 10% of Paper 4 marks. It covers the atomic model, radioactivity (alpha, beta, gamma), half-life, and the random nature of radioactive decay. Most students skip this because it looks small. The grade-9 students do not skip it — they use it as a free mark bank.

Examiner traps in the atomic model:

• Confusing the Rutherford model (nuclear, mostly empty space) with the Bohr model (electrons in fixed orbits). Cambridge marks the difference.
• Miswriting isotope notation — the nucleon number goes ABOVE the atomic number, the symbol in the middle, like ¹⁴₆C for carbon-14. Wrong layout = 0 marks.
• Confusing atomic number Z (proton count) with nucleon number A (proton + neutron count). Different marks, different definitions.

Examiner traps in radioactivity:

• Confusing alpha (helium nucleus, ⁴₂He, +2 charge, stopped by paper) with beta (electron, ⁰₋₁e, -1 charge, stopped by aluminium) with gamma (EM radiation, ⁰₀γ, 0 charge, stopped by thick lead). Cambridge marks penetration AND ionisation AND charge.
• Misapplying half-life — confusing "the time for half the nuclei to decay" with "the time for the activity to halve" (these are the same, but Cambridge often asks for one or the other to test understanding).
• Confusing activity (Bq = decays per second) with count rate (counts per second, what a Geiger counter reads). Cambridge marks them as different quantities.
• Misreading background radiation — failing to subtract it from a count-rate reading before calculating half-life. This is a 1-mark loss that compounds across the question.

AI tutor drill: ask "A radioactive sample has a count rate of 360 counts/s at 09:00 and 90 counts/s at 15:00. Background radiation is 30 counts/s. Calculate the half-life." If the AI tutor subtracts background (30) from both readings first, then computes 330 → 60 (a factor of 5.5, ~2.46 half-lives over 6 hours → 2.44 hours per half-life), it is 0625-aware.

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The 5 Hardest Practicals (Paper 6 / Paper 5)

Cambridge 0625 Paper 6 (Alternative to Practical) is worth 60 marks and roughly 30% of the grade. The 5 practicals that consistently decide the grade:

Practical 1 — Measuring g by Free-Fall

A steel ball is dropped through a timing gate. Students measure the distance fallen and the time taken, then plot a graph of distance vs time² to extract g from the slope (g/2).

Mark scheme traps:

• Forgetting to take repeat readings of the time — Cambridge marks "evidence of repeat measurements" as 1 mark.
• Not identifying the anomalous result — Cambridge marks "identifies anomalous result and excludes it from the graph" as 1 mark.
• Drawing a best-fit straight line that ignores the points rather than balancing them above and below.
• Failing to use a large triangle for the gradient (the triangle should cover at least half the drawn line).
• Forgetting the units on the gradient — g/2 has units of m/s², so g = 2 × gradient has units of m/s². Cambridge marks the units.

Practical 2 — Investigating Cooling (Newton's Law of Cooling)

A beaker of hot water cools and students record temperature at fixed time intervals.

Mark scheme traps:

• Not stirring the water before each reading — Cambridge marks "stirs before reading" as 1 mark.
• Recording temperature at irregular intervals (e.g. 30 s, 45 s, 80 s) instead of fixed intervals like 60 s.
• Failing to plot a graph of temperature vs time with sensible scales (the y-axis should cover the full temperature range; the x-axis should cover the full time range).
• Not describing the trend in words — Cambridge marks "temperature decreases at a decreasing rate" as 1 mark.
• Confusing rate of cooling with temperature difference from room temperature. Newton's Law of Cooling is about the temperature difference, not the absolute temperature.

Practical 3 — The Resistivity of a Wire

Students measure the resistance of a wire at different lengths, plot R vs L, and extract resistivity from the gradient (ρ/A).

Mark scheme traps:

• Not measuring the diameter of the wire with a micrometer (not a ruler) — Cambridge marks "uses micrometer to measure diameter at 3 different positions" as 1 mark.
• Failing to take the mean of the diameter readings before calculating cross-sectional area.
• Not checking the wire is straight between the contact points.
• Using an ohmmeter instead of an ammeter + voltmeter + power supply setup. Cambridge marks the full circuit.
• Drawing the best-fit line through the origin — if the wire has non-zero contact resistance, the line may not pass through the origin, and forcing it to = 1 mark loss.

Practical 4 — The I/V Characteristic of a Filament Lamp

Students vary the voltage across a filament lamp and record the current at each voltage, then plot I vs V.

Mark scheme traps:

• Using a variable resistor as a potential divider, not just a series resistor. Cambridge marks the circuit.
• Forgetting to record V = 0, I = 0 before switching on — Cambridge marks "starts at V = 0 and increases in small steps" as 1 mark.
• Drawing the graph with the origin at the bottom-left — the I-V curve of a filament lamp is non-linear (current increases more slowly as V rises because R increases with temperature).
• Not reversing the polarity to check symmetry — filament lamps are non-polarised, but other components (diodes) are, and Cambridge sometimes asks.

Practical 5 — Plane Mirror Reflection and Refraction

Students use a pin box (or optics bench) to find the image position in a plane mirror and to measure the refractive index of a glass block.

Mark scheme traps:

• Parallax error when reading the pin positions — the eye should be directly above the pin, not at an angle. Cambridge marks "no parallax error" as 1 mark.
• Drawing the incident and reflected rays as straight lines, not curves.
• Measuring the angle of incidence and angle of reflection with a protractor at the point where the ray hits the mirror, not at the pin position.
• Failing to repeat with different angles to verify the law of reflection.

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The 6-Week AI Workflow That Beats the Textbook

Here is the 6-week revision workflow that Cambridge 0625 examiners implicitly reward — students who follow it typically climb 1-2 grades between mocks and finals.

Week 1 — Topic map and gap diagnosis. Use a 0625-aware AI tutor to map your current knowledge against the 3 topic groups. Generate a 30-question diagnostic covering General Physics, Electricity & Magnetism, and Atomic Physics. Mark yourself strictly. The output is a per-topic-group grade (A*–G) and a list of specific gaps (e.g. "you confuse e.m.f. with p.d."). This becomes your study plan.

Week 2 — General Physics deep-dive. Focus on motion, forces, energy, and waves. Do 2 Paper 4 past papers under timed conditions. Mark them against the Cambridge mark scheme (not the textbook answer key). For every mark you drop, write down which skill failed: graph interpretation, unit conversion, command-word precision, formula rearrangement, or concept. Hand this list to your AI tutor on Monday.

Week 3 — Electricity & Magnetism deep-dive. Focus on circuits, electromagnetic effects, and the CRO. Do 2 more Paper 4 past papers. Same drill: mark against the mark scheme, classify every dropped mark by skill, hand the list to your AI tutor.

Week 4 — Atomic Physics + practicals. Atomic Physics is a free mark bank — cover it in 2 days. Spend the remaining 5 days on Paper 6 / Paper 5. Do 3 past Paper 6s. The Paper 6 mark scheme is highly prescriptive — follow it exactly.

Week 5 — Past papers under exam conditions. Do 4 full Paper 4s and 4 full Paper 6s under timed conditions (45 min for Paper 2, 1h 15m for Paper 4, 1h for Paper 6). Mark strictly. Track your grade trajectory.

Week 6 — Targeted gap closure + mock exam. Spend the first 4 days on the 2-3 specific gaps that kept recurring across the past papers. Use your AI tutor to drill 50+ targeted questions on each gap. Spend the last 3 days on a full mock exam (Paper 2 + Paper 4 + Paper 6) under exam conditions.

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The 5 FAQs Cambridge 0625 Students Ask Most

Q: Is 0625 the same as GCSE Physics? A: No. The content overlaps by ~80%, but the command words, mark schemes, topic grouping, and grade boundaries all differ. Revising GCSE Physics for 0625 will leave you short on graph-skill precision and CRO interpretation.

Q: Do I need to memorise the entire syllabus? A: No. The 3 topic groups are predictable in their weighting: General Physics is ~50%, Electricity & Magnetism is ~40%, Atomic Physics is ~10%. Focus your time accordingly.

Q: Is Paper 2 (MCQ) easier than Paper 4? A: Yes, but the marks are weighted lower. Paper 2 is 40 marks / 30% of the grade. Paper 4 is 80 marks / 50% of the grade. Don't spend more than 45 minutes on Paper 2.

Q: Should I take Paper 5 or Paper 6? A: Depends on your school. Paper 5 is a school-based practical (your teacher marks it). Paper 6 is a written alternative-to-practical (Cambridge marks it). Most international schools sit Paper 6 because of teacher workload. Confirm with your exam officer.

Q: How many past papers should I do? A: Minimum 6 of Paper 4 (varied years + sessions), 4 of Paper 2, 4 of Paper 6. Spread across the 6 weeks. The biggest gains come from marking your answers against the actual mark scheme, not from doing more papers.

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How Grademy Works for 0625

Grademy is built for Cambridge IGCSE Physics 0625 specifically. When you tell it you are studying 0625, it:

• Tags every question to the 3 topic groups above
• Marks your answer using Cambridge's command-word precision (state vs explain vs describe)
• Weights the mark scheme to the actual Paper 4 / Paper 6 split
• Generates 6-mark questions with the same deliberate traps as the real Cambridge paper
• Tracks your gap by topic group so you can see "you are A* in General Physics, C in Electricity"
• Marks graph interpretation, unit conversion, and CRO reading as SEPARATE skills from the underlying physics

This is what a syllabus-aware AI tutor looks like. The generic GCSE version is not the same product.

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Closing Thought

IGCSE Physics 0625 is the IGCSE science subject where the difference between grade C and grade A* is most often graph-skill precision and command-word discipline, not physics knowledge. The students who climb a grade between mocks and finals are not the ones who read the textbook twice. They are the ones who did 8+ past papers, marked their answers against the actual mark scheme, identified the 2-3 specific examiner-trap topics they kept missing, and drilled those traps with targeted AI feedback.

If you do one thing this week: download the May 2025 Paper 4, sit it timed, mark it against the mark scheme, and write down one sentence for every mark you dropped. Hand that sentence to your AI tutor on Monday. That sentence is the gap the AI tutor will spend the next 6 weeks closing.

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Related posts: How to Practise IGCSE Past Papers with AI in 2026 covers the weekly past-paper workflow. AI Tutor for IGCSE in 2026: International Schools Guide covers how to pick an AI tutor that is actually 0625-aware. AI Tutor for IGCSE Biology 0610 in 2026: Cambridge Syllabus Guide covers the parallel Biology deep-dive. AI Tutor for IGCSE Chemistry 0620 in 2026: Cambridge Syllabus Guide covers the parallel Chemistry deep-dive. AI Tutor for KS3, Year 9 Options and IB MYP in 2026 covers the Year 9 choices before IGCSE. AI Tutor for A-Level in 2026 — UK Sixth-Form Parent Guide covers the next step after IGCSE.

More from Grademy: For the parallel IGCSE Physics 0625 deep-dive, our IGCSE Mathematics 0580 AI tutor 2026 guide covers the 5 topic groups, 6 hardest command words, and a 6-week AI workflow that beats the textbook.

Pairs with IGCSE Computer Science 0478 (post-129)

The IGCSE Physics 0625 playbook (post-117) + IGCSE Computer Science 0478 playbook (post-129) form the IGCSE physics-electronics + computer-hardware theory pair for the international British-curriculum cohort. The IGCSE Computer Science 0478 hardware-theory theme (computer-hardware + CPU + memory + RAM + ROM + cache + storage + logic-gates + binary + hexadecimal + ASCII + Unicode + von-Neumann-architecture + fetch-execute-cycle + machine-code + assembly-language + high-level-languages + compilers + interpreters + operating-systems + networks + TCP-IP + encryption + cybersecurity + AI + machine-learning + IoT + embedded-systems + sensors + actuators) all depend on the IGCSE Physics 0625 electronics foundation (electricity + circuits + capacitors + resistors + semiconductors + logic-gates + electromagnetism + waves + signals + signal-processing + analogue-vs-digital + sampling + bit-depth + Nyquist-theorem + data-transmission + optical-fibres + radio-waves + microwaves). Candidates sitting 0625 should pair with 0478 for the electronics + computer-hardware + IoT + embedded-systems + signal-processing + robotics + aerospace foundation. Grademy AI tutor holds both specs in working memory for A-Level Physics + A-Level Computer Science + IB Physics HL + IB Computer Science HL + AP Physics + AP Computer Science + electrical-engineering + electronics + mechatronics + robotics + IoT + embedded-systems + aerospace + software-engineering + data-science + machine-learning + AI + Russell-Group + Oxbridge + Imperial + UCL + Warwick + Cambridge + Bristol + Durham + Manchester + Edinburgh + NUS + NTU + SMU + HKU + CUHK + HKUST admissions.