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Physics Topic Index | 2026 O-Level to 2027 SEC G3 Pure and Combined Science

Physics Topic Index for Pure and Combined Science is eduKateSingapore’s canonical map from the final 2026 O-Level Physics naming into the 2027 G3 SEC Science system. Students searching O-Level Physics topics, Pure Physics syllabus, Combined Science Physics topics, 6091 Physics, K323 Physics, K326 or K327 Science need to know which content route they are actually taking before they revise.

From 2027, G3 Pure Physics uses subject code K323, with 6091 listed by SEAB as the reference code for 2026 and earlier. G3 Combined Science routes containing Physics use K326 Science (Physics, Chemistry) or K327 Science (Physics, Biology), with 5086 and 5087 as the earlier reference codes. The Pure and Combined routes overlap substantially but are not identical in depth or topic structure.

This page belongs to the Secondary Science Shelf. It is a syllabus-facing index. Deeper explanations route into Science World and How Secondary Science Works.

2027 G3 Pure Physics: K323

SEAB organises K323 into six sections and 20 topics.

I. Measurement

  • 1. Physical Quantities, Units and Measurement

II. Newtonian Mechanics

  • 2. Kinematics
  • 3. Dynamics
  • 4. Turning Effect of Forces
  • 5. Pressure
  • 6. Energy

III. Thermal Physics

  • 7. Kinetic Particle Model of Matter
  • 8. Thermal Processes
  • 9. Thermal Properties of Matter

IV. Waves

  • 10. General Properties of Waves
  • 11. Electromagnetic Spectrum
  • 12. Light

V. Electricity and Magnetism

  • 13. Static Electricity
  • 14. Current of Electricity
  • 15. D.C. Circuits
  • 16. Practical Electricity
  • 17. Magnetism
  • 18. Electromagnetism
  • 19. Electromagnetic Induction

VI. Radioactivity

  • 20. Radioactivity

2027 G3 Combined Science Physics component

In the K326/K327 Combined Science syllabus, the Physics component is organised into 16 topics. The overall spine is still measurement, mechanics, thermal physics, waves, electricity/magnetism and radioactivity, but some Pure Physics subdivisions are combined.

  • Physical Quantities, Units and Measurement
  • Kinematics
  • Force and Pressure
  • Dynamics
  • Turning Effect of Forces
  • Energy
  • Kinetic Particle Model of Matter
  • Thermal Processes
  • General Wave Properties
  • Electromagnetic Spectrum
  • Light
  • Electric Charges and Current of Electricity
  • D.C. Circuits
  • Practical Electricity
  • Magnetism and Electromagnetism
  • Radioactivity

Pure versus Combined: what not to assume

Do not revise from a Pure Physics checklist if you are taking Combined Science, or vice versa. Topic names may overlap while expected detail, assessment structure and practical emphasis differ.

The correct authority is the syllabus code shown on the student’s subject registration and school materials.

The Physics dependency map

  • Measurement → every calculation and practical.
  • Kinematics → dynamics and motion graphs.
  • Dynamics → forces, pressure, moments and energy.
  • Particle model → thermal processes.
  • Wave properties → electromagnetic spectrum and light.
  • Current → circuits → practical electricity.
  • Magnetism → electromagnetism → induction in Pure Physics.
  • Energy and particle ideas → radioactivity.

Practices of Science

Current SEC science syllabuses assess more than recall. Students must handle information, solve problems, interpret data and demonstrate experimental skills.

A topic is not secure if the student can recite a definition but cannot read a graph, control units, explain a mechanism or evaluate an experiment.

The Physics calculation spine

  • units and prefixes
  • speed/velocity and acceleration
  • forces and resultant effects
  • moments
  • work, energy and power
  • pressure
  • wave quantities
  • current, voltage, resistance and circuit relations

The Physics explanation spine

  • state observation
  • identify relevant physical quantity or model
  • state the relationship
  • apply it to the specific system
  • return to the observed effect

Common failure modes

  • formula selected from keywords rather than relationship
  • units not converted
  • vector direction/sign ignored
  • graph gradient/area misinterpreted
  • particle explanation describes instead of explains
  • circuit rules memorised without current/voltage model
  • practical answer lacks variables, control or measurement detail

Start with these live routes

Atlas will add dedicated canonical owners for Kinematics and Electricity next, then route them into the relevant Science World mechanisms.

How to revise the index

  1. Mark every topic green/amber/red.
  2. For each red topic, identify fact, concept, calculation, graph, practical or explanation failure.
  3. Repair the first weak dependency.
  4. Do one direct question.
  5. Do one unfamiliar-context question.
  6. Retest after a delay.

Frequently asked questions

What replaces O-Level Pure Physics in 2027?

G3 Physics K323; SEAB lists 6091 as the 2026-and-earlier reference code.

Which Combined Science codes contain Physics?

K326 Physics/Chemistry and K327 Physics/Biology for G3 SEC.

Are Pure and Combined Physics identical?

No. They share a large conceptual spine but differ in content organisation and depth.

Should I revise by chapter only?

No. Also revise calculations, graph/data interpretation, practical skills and explanation mechanisms across chapters.

Where does this sit in Atlas?

This is the canonical Physics syllabus index under the Secondary Science Shelf.

The final Physics rule

Confirm the subject code first. Then learn Physics as a chain of models and relationships rather than twenty isolated chapters. The index tells you what is in scope; Science World explains why it works.

Opening Physics concept owners

Canonical topic owners now live: Kinematics · Electricity. Use these for syllabus-facing learning and return to Science World for deeper mechanism routes.

Explore the connected learning guides

Choose the question that brought you here. Open one useful guide, try a small task, and stop when you have what you need.

Take one question further

The same learning habit can travel across subjects, while each subject keeps its own methods. These routes help you notice a difficulty, understand one part of it, and return to something you can do.

A word is familiar, but using it is difficult.

Move from recognising a word to retrieving it in a new context. Understand vocabulary plateaus.

Try it without the guide: Choose one word you already know. Close the guide and use it in a new sentence. Explain why it fits; try another context tomorrow.

A piece of writing has ideas, but the reader loses the thread.

Make the order of events and the links between sentences clear. Explore composition writing.

Try it without the guide: Choose one short paragraph. Read the relevant explanation, close it, and revise the paragraph. Ask someone to tell you what happened and why.

The Mathematics seems familiar, but marks still disappear.

Find the first point where the working stops being reliable. Find Secondary 4 A-Math mark leakage.

Try it without the guide: For a Secondary 4 A-Math question you have attempted, locate the first uncertain line. Repair that step, then try a comparable question without the worked answer.

A Science fact is remembered, but the explanation is incomplete.

Connect the evidence to a scientific idea and the resulting change. Follow the Primary Science learning route.

Try it without the guide: Choose a familiar Primary Science example. Explain the evidence, the idea and the result without notes. Then change one condition and explain your prediction.

Two accounts of the world seem to disagree.

Check the question, source, date and evidence before combining claims. Explore the World Knowledge research library.

Try it without the guide: Take one claim. Find the source best placed to support it, note its date, and state what remains uncertain. Return to your original question.

There is plenty of help, but independence is hard to see.

Check what the learner can understand and do after support is removed. Understand how education works.

Try it without the guide: Choose one small task the child has practised. Agree on a calm, brief attempt without prompts. Use what happens to choose one next step, then stop.

For the structure behind these connections, read the eduKateSingapore runtime manifest and the eduKate ecosystem boot contract. The reader map describes public navigation; those manifests preserve the wider ownership and return rules.