Physics is the subject that explains how the universe works, from the forces that keep you on the ground to the stars burning billions of kilometres away. Here is how the Edexcel IGCSE specification is structured, what the exams demand, and how to prepare for them.
Edexcel IGCSE Physics (4PH1) is a two-year course offered by Pearson for students aged 14 to 16 worldwide. It covers the fundamental principles of physics: how objects move, how electricity behaves, how waves carry energy, how matter changes state, and how the universe itself evolved. There is no coursework component and no practical examination. Your entire grade comes from two written papers sat at the end of the course.
This is your edexcel igcse physics study guide, covering the full specification, the structure of both exam papers, the topics that carry the most weight, and a concrete study timeline to help you prepare. Whether you are starting the course or deep into revision, this page gives you the map.
The Edexcel IGCSE Physics specification at a glance
The edexcel igcse physics specification divides the subject into eight sections. Each section covers a distinct area of physics, though many concepts connect across sections. The edexcel igcse physics syllabus is designed so that earlier sections lay foundations for later ones.
| Section | What it covers | Exam relevance |
|---|---|---|
| Forces and motion | Speed, velocity, acceleration, forces, momentum, moments | Examined very heavily across both papers |
| Electricity | Circuits, resistance, mains electricity, static charge | Regularly tested, particularly circuit calculations |
| Waves | Wave properties, EM spectrum, light, sound, refraction | Appears frequently, especially light and sound |
| Energy resources and energy transfers | Energy stores, efficiency, work, power, electricity generation | Commonly examined, especially energy calculations |
| Solids, liquids and gases | Density, pressure, changes of state, gas laws | Very heavily tested, particularly density and pressure |
| Magnetism and electromagnetism | Magnets, electromagnets, motors, generators, transformers | Regular exam presence, especially electromagnetic induction |
| Radioactivity and particles | Atomic structure, radiation types, half-life, fission, fusion | Commonly tested across both papers |
| Astrophysics | Solar system, stellar evolution, Big Bang, red-shift | Tested in Paper 2 extended material |
The eight sections are not equally weighted. Some areas carry far more exam presence than others, and understanding this distribution is key to smart revision.
Edexcel IGCSE Physics topics: where the marks concentrate
Not every topic appears with the same regularity on the exam. Some areas turn up in nearly every paper; others appear less often but still need solid understanding. The edexcel igcse physics topics listed below are organised by how frequently they feature in exams, starting with those that carry the greatest weight.
Forces, Movement, Shape and Momentum is the single most reliably examined area in the entire specification. Newton's laws, F = ma calculations, momentum conservation, stopping distances, Hooke's law and moments all appear regularly. If you can confidently set up and solve a momentum problem, draw a free-body diagram, and apply the principle of moments, you are covering the ground that matters most.
Density and Pressure sits alongside forces as a very heavily examined topic. You need to calculate density from mass and volume, apply pressure = force / area, and use the liquid pressure equation p = h x rho x g. The calculations are typically straightforward, but students often lose marks by forgetting to convert units or by confusing density with weight.
Energy Transfers is commonly examined across both papers. Energy stores, Sankey diagrams, efficiency calculations, and the distinction between conduction, convection and radiation form the core. Exam questions frequently ask you to trace the energy pathway through a device, identify the useful output, and calculate efficiency.
Light and Sound carries significant weight. Reflection, refraction, Snell's law (n = sin i / sin r), total internal reflection, critical angle, and the properties of sound waves all feature regularly. Calculation questions involving refractive index are among the most predictable in the specification.
Radioactivity appears on most papers. Half-life calculations, the properties of alpha, beta and gamma radiation, nuclear equations, and the uses and dangers of radioactive materials are all commonly tested. The ability to balance a nuclear equation and read a half-life graph are skills that come up repeatedly.
At a moderate level of exam presence, Movement and Position (speed, velocity, distance-time and velocity-time graphs), Properties of Waves (wave speed equation, frequency, wavelength, the Doppler effect) and Energy and Voltage in Circuits (V = IR, series and parallel circuits, charge calculations) all appear regularly and deserve thorough revision.
The two papers: structure and format
Both papers are compulsory. There is no tiering, no optional questions, and calculators are permitted throughout. Your final grade comes from the combined mark across both papers.
| Paper | Duration | Marks | Content | Weighting |
|---|---|---|---|---|
| Paper 1 | 2 hours | 110 | Core content from all eight sections | 61.1% |
| Paper 2 | 1 hour 15 minutes | 70 | All content, including extended (P) material | 38.9% |
Both papers use a mixture of multiple-choice questions, short-answer questions, calculations and extended open-response questions. Paper 1 is the longer exam and covers core content only. Paper 2 is shorter but covers everything, including the extended (P) material that goes beyond what Paper 1 tests. The extended material includes topics like gas laws, electromagnetic induction, transformers, stellar evolution and cosmology.
The marks-per-minute ratio is similar across both papers (roughly 0.9 marks per minute for Paper 1, and 0.93 for Paper 2), so neither should feel significantly more rushed than the other if you manage your time well.
How to approach each paper
Paper 1 strategy
Paper 1 is 2 hours for 110 marks. That gives you just over a minute per mark. The paper typically starts with shorter, more accessible questions and builds toward longer, more demanding ones at the end.
- Work through in order. The questions are designed to build in difficulty. Do not skip around unless you are genuinely stuck on a particular question.
- Show all working in calculations. Write the formula, substitute the values, and present the answer with correct units. Even if your final answer is wrong, correct method picks up partial marks.
- For "explain" questions, give a mechanism. Saying "the current increases" is not an explanation. Saying "the resistance decreases, so by V = IR with constant voltage, the current increases" is.
- Watch the mark allocation. A 3-mark question needs three distinct points. Do not write a paragraph when three clear sentences will do.
Paper 2 strategy
Paper 2 is 1 hour 15 minutes for 70 marks. It covers the extended (P) material on top of everything in Paper 1. The questions tend to demand more application to unfamiliar contexts.
- Know the extended (P) content thoroughly. This includes gas laws (p1V1 = p2V2 and p1/T1 = p2/T2), electromagnetic induction, transformers, stellar evolution and the Big Bang theory. These topics only appear on Paper 2.
- Practise data interpretation. Paper 2 frequently presents graphs, tables or experimental results you have not seen before and asks you to apply physics principles to explain them.
- Be precise with physics terminology. At this level, vague language costs marks. "The particles move faster" is weaker than "the average kinetic energy of the molecules increases."
Edexcel IGCSE Physics grade boundaries
Edexcel IGCSE Physics is graded on the 9-1 scale, where 9 is the highest grade and 1 is the lowest pass. The edexcel igcse physics grade boundaries shift from session to session depending on paper difficulty, so there is no fixed percentage that guarantees a particular grade. As a rough guide, a grade 9 typically requires around 80-85% of the total marks, a grade 7 around 60-65%, and a grade 4 (the standard pass) around 30-35%. Always check the most recent boundaries on the Pearson website after each session.
The total across both papers is 180 marks (110 + 70). Your final grade is calculated from the combined raw mark, not from each paper separately. A strong Paper 1 performance can offset a weaker Paper 2 and vice versa.
A study timeline that works
This assumes a May or June exam series and a student beginning focused revision in January. Shift the dates if your exam is in a different window.
| When | What to do |
|---|---|
| January | Work through all eight specification sections in order. For each topic, read your notes, close them, and write out the key equations and concepts from memory. Flag anything you cannot recall. Use the specification checklist to confirm full coverage. |
| February | Focus on your weakest areas. If forces and momentum feel shaky, spend entire sessions on those topics until you can solve problems without notes. Begin doing past paper questions sorted by topic rather than full papers. |
| March | Continue topic-based revision but begin integrating timed practice. Do sections of past papers under exam conditions. Start building an error log: for every mark lost, write down what went wrong and what the correct answer was. |
| April | Full past papers under timed conditions. Paper 1 in 2 hours, Paper 2 in 1 hour 15 minutes, no notes. Mark with the official mark scheme. Your error log should now reveal patterns in what you keep getting wrong. |
| May (exam month) | One full paper every other day, alternating Paper 1 and Paper 2. On the days between, target the topics where you lose marks most often. The day before the exam, review your error log and rest. |
Edexcel IGCSE Physics revision notes: what good ones look like
Effective edexcel igcse physics revision notes are not transcriptions of your textbook. They are condensed, active summaries that force you to think. For each topic, your notes should contain:
- Key definitions in the exact wording the specification uses. "Speed is the distance travelled per unit time" is precise. "Speed is how fast something goes" is not enough for an exam answer.
- Every equation relevant to that topic, with the units for each quantity. For example: F = m x a, where F is force in newtons (N), m is mass in kilograms (kg), and a is acceleration in m/s2.
- One worked example for each equation, showing formula, substitution and answer with units.
- Common mistakes specific to that topic, written as warnings to your future self.
The Green Bridge CBT platform provides structured edexcel igcse physics notes organised by specification topic, along with practice questions that track your performance and highlight weak areas before the exam reveals them.
Recommended resources
- The specification itself. Download the physics edexcel specification from the Pearson website. Every exam question must come from what is listed there. If a topic is in your textbook but not in the specification, it will not be tested.
- Edexcel IGCSE Physics past papers and mark schemes. Available on the Pearson website going back several years. Study the mark schemes carefully; they reveal exactly what examiners expect, and it is not always what you might assume.
- Examiner reports. Published after each session, these identify the questions candidates found hardest and the most common errors. They are practical and specific.
- The Green Bridge CBT platform. Use it for igcse 4ph1 revision, past questions by topic, and performance tracking.
Physics rewards precision. A vague answer in English literature might still pick up marks; a vague answer in physics almost never does. Every calculation needs a formula, a substitution, and an answer with units. Every explanation needs a mechanism, not just a label. The students who do well on the edexcel physics exam are not necessarily the ones who study the longest; they are the ones who practise retrieving information actively, fix their mistakes systematically, and go into the exam knowing exactly what each question type demands.
Complete guide to Edexcel IGCSE Physics (4PH1): specification structure, both exam papers, key topics, grade boundaries and a revision timeline.
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