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Physical Quantities, Units and Measurement
Use SI units, instruments, data, graphs, and uncertainty within the Combined Science component scope.
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Choose a science, then open the chapter you need. These notes follow the 2027 K327 Combined Science syllabus.
Last updated: 2026-07-16
Sitting the exam in 2027? Use K327. Sitting in 2026? Keep using the current 5087 syllabus and your school materials.
K327 uses Paper 2 for Physics, Paper 4 for Biology, and Paper 5 for practical work drawn from both components. Confirm current details in the official master syllabus.
Combined Physics has 16 top-level topics. It groups and narrows the 20-topic K323 Pure Physics map, so a Pure Physics checklist is not a safe substitute.
01
1
Use SI units, instruments, data, graphs, and uncertainty within the Combined Science component scope.
2
Connect speed, velocity, acceleration, distance-time graphs, and speed-time graphs within one-direction motion.
3
Keep mass, weight, density, force, contact area, and pressure distinct before choosing a relationship.
4
Use resultant force and motion reasoning from a clear force model.
5
Use moments, perpendicular distance, equilibrium, and centre of gravity within component scope.
6
Track energy stores and transfers, then calculate work, kinetic energy, gravitational potential energy, and power.
7
Explain states, temperature, internal energy, and phase changes using particle spacing, motion, and forces.
8
Explain conduction, convection, radiation, and the dominant transfer path in context.
9
Use wave quantities, transverse and longitudinal models, sound, and echo reasoning.
10
Compare spectrum regions, uses, and hazards through frequency and interaction.
11
Use ray diagrams and the required reflection, refraction, refractive-index, and converging-lens ideas.
12
Separate static charge from current and relate charge flow, potential difference, and resistance.
13
Apply symbols, measurements, series and parallel rules, and equivalent resistance to labelled circuits.
14
Explain mains wiring, safety devices, power ratings, and energy use.
15
Connect magnet properties, induced magnetism, current-produced fields, and the motor effect.
16
Compare emissions, interpret half-life, and balance uses against exposure risk.
Combined Biology has 12 top-level topics. It does not retain standalone Excretion or Homeostasis, Co-ordination and Response topics, and Reproduction is narrower than Pure Biology.
01
1
Connect named plant and animal cell structures to their functions and to specialised-cell adaptations.
2
Explain diffusion and osmosis, then interpret tissue investigations without adding active transport.
3
Connect nutrient roles, food tests, biological synthesis, and enzyme action to evidence.
02
4
Trace digestion, absorption, hepatic portal transport, liver roles, hormones, blood-glucose control, and type 2 diabetes.
5
Connect blood, vessels, heart action, valves, double circulation, and coronary heart disease.
6
Connect gas-exchange structures, tobacco-smoke effects, respiration, and oxygen debt.
7
Distinguish infectious disease, transmission, vaccination, antibiotics, and resistance through named examples.
03
8
Link leaf and root structures, photosynthesis, xylem, phloem, transpiration, wilting, and translocation.
9
Interpret energy flow, trophic losses, ecological pyramids, carbon cycling, global warming, and mitigating action.
04
10
Connect DNA, genes, chromosomes, base pairing, and the genetic code to polypeptide sequence.
11
Relate human reproductive structures, the menstrual cycle, fertilisation, implantation, and HIV prevention.
12
Use inheritance terms, simple crosses, variation, sample size, sex determination, mutation, and mutagens.
Official curriculum source: SEAB 2027 SEC G3 Science (Physics, Biology) K327 syllabus. Checked 15 July 2026. Recheck codes, outcomes and assessment details before annual updates.
The focus lines are Eclat revision guidance. They are not quoted syllabus text and do not replace the official learning outcomes.
This hub maps the official 2027 SEC G3 Science (Physics, Biology) K327 top-level topics. The linked SEAB syllabus remains authoritative for every assessable learning outcome and paper detail.
O-Level is still familiar reader language and 5087 is the 2026-and-earlier reference code. Students sitting in 2027 should use K327, while 2026 candidates must follow their current legacy syllabus and school instructions.
Only as a national comparison. IP schools control their own sequence, depth, and assessment scope, so IP students should use the separate IP route and follow current school materials first.