Get the tier wrong on a Physics mock and every result it produces is noise. For Cambridge IGCSE Physics 0625, a mock has to respect a qualification assessed across genuinely different components — a multiple-choice paper, structured theory at the Core or Extended tier, and a practical or alternative-to-practical element — with marks spread across the syllabus content areas and a difficulty curve that opens gently and climbs. Grab two random past papers at the wrong tier and you’ll build something that over-tests a handful of favourite topics, skips the practical skills altogether, and predicts nothing about the summer. Match the components and the tier first, choose questions second, and the mock earns its place in the hall.

Start from the real 0625 structure

Before you pick a single question, fix the skeleton. Cambridge assesses 0625 through several components of different types, and a mock that ignores that tests the wrong thing. (Treat the exact paper count, durations and weightings as something to confirm against the current syllabus — they’re easy to misremember, and it’s better to be slightly general than precisely wrong.) A mock that respects the structure means:

• More than one component type. Don’t build a single structured paper and call it the mock. The real qualification tests recognition and speed (multiple-choice), extended reasoning and calculation (structured theory), and practical understanding (the practical/ATP element). If you run only one type, label it clearly as “structured-theory equivalent” and don’t let students treat a slice as the whole.
• The right tier. Build an Extended mock for your Extended entry and a Core mock for the Core group. Mixing tiers in one paper tells you little — a strong Extended candidate cruising through Core content and a Core candidate stranded on Extended-only questions both produce uninformative scripts.
• A practical dimension if you can. Even a short alternative-to-practical-style section — read a scale, plot a graph, identify a source of error, suggest an improvement — keeps the mock honest about a skill the structured theory alone doesn’t test.

This is the 0625-specific version of the principle in the parent guide, building an IGCSE mock exam in minutes from past papers: mirror the real components first, choose questions second.

Balance the paper across the content areas

The most common way a home-made physics mock goes wrong is topic imbalance — three questions on electricity, nothing on thermal or space. A 0625 paper draws across all of:

1. Motion, forces and energy (general physics)
2. Thermal physics
3. Waves (light and sound)
4. Electricity and magnetism
5. Electromagnetic induction
6. Nuclear physics
7. Space physics

You don’t need to match Cambridge’s exact weighting to the mark — and you shouldn’t claim a precise weighting you haven’t verified against the current syllabus — but you should consciously spread your marks so no major area is missing and no minor one dominates. A quick check before you finalise: tally the marks by content area and look for a zero or a runaway. If thermal physics is absent and electricity is a third of the paper, rebalance. The smaller areas — space physics, electromagnetic induction — are the ones a home-made mock most often drops entirely.

Build the difficulty curve deliberately

Real Cambridge papers ramp: they open with accessible marks to settle students and build toward the multi-step calculations and the extended “explain” questions that separate the top grades. Reproduce that. A useful pattern for an Extended mock:

• Opening third — recall and single-step items (state a law, name a component, one-line substitutions) so every student banks marks early.
• Middle third — standard multi-step calculations: a circuit problem, a specific-heat-capacity calculation, a wave-equation question — the kind where working and units are credited at each step.
• Final third — the stretch: the six-mark extended explanations, a multi-stage calculation that combines two ideas, the practical-reasoning items where students justify a method or identify error.

A mock that’s uniformly hard demoralises and tells you nothing about your borderline students; one that’s uniformly easy hides the gaps that matter. The curve is the point. For the broader argument about not trading quality for speed, see the fastest way to build a mock without sacrificing quality.

Decide how it gets marked before students sit it

A full-class physics mock across multiple components is a marking event in its own right — and 0625’s marking is detailed, with working and units credited on calculations and a levels judgement on the extended answers. Decide upfront: the multiple-choice and the structured, point-marked calculations can be marked to the Cambridge scheme consistently — and automatically, if you’re using a platform that does it — which is most of the paper; the six-mark extended explanations and the open practical reasoning you review yourself. Planning this before the mock, not after, is what stops a well-built mock from becoming a weekend lost to red pen. The marking detail — marking points, the unit requirement, the levels judgement on extended answers — is covered in the 0625 mark scheme marking guide.

A repeatable build sequence

1. Fix the skeleton — the component types you’ll run, the correct tier, a practical dimension if possible.
2. Pull questions by content area from a tagged 0625 question bank, spreading across all the areas including the small ones.
3. Order them into a difficulty ramp — accessible to stretch, within each component.
4. Tally marks by area and difficulty — check for gaps and runaways; rebalance the thermal/space/induction blind spots.
5. Set the marking plan — auto-mark the multiple-choice and structured calculations to the scheme, flag the extended and practical-reasoning items for your review.
6. Keep the blueprint — once you’ve built a balanced 0625 mock, save the structure and swap in fresh questions next term rather than rebuilding from scratch.

That last step is the quiet win: the first mock takes thought, but the blueprint makes every subsequent one a ten-minute job.

How this looks on the platform

Tutopiya’s Cambridge IGCSE Physics 0625 resources let you assemble a mock from real past-paper questions filtered by content area, tier and difficulty, set it as a timed paper, and auto-mark the structured and multiple-choice questions to the Cambridge scheme so the results come back as topic-level data, not just a total. It’s free to start with one class — see the full teacher platform these guides put to work.

This is one of four 0625 guides. The others cover marking 0625 to the Cambridge mark scheme, the 0625 past-paper question bank, and 0625 lesson resources mapped to the syllabus.

FAQ

Should a 0625 mock include multiple-choice as well as structured questions? Ideally yes — the real qualification tests recognition and speed through multiple-choice and extended reasoning through structured theory, and they’re different skills. If time forces a single structured paper, label it as a structured-theory equivalent and don’t treat the result as a full-qualification prediction.

Do I need to include a practical element? A practical or alternative-to-practical dimension is part of the real assessment, so even a short section — read a scale, plot and interpret a graph, identify a source of error — keeps the mock honest about a skill the structured theory alone doesn’t measure. It’s worth building in if you can.

Should the mock be Core or Extended? Match it to the entry. Build an Extended mock for your Extended group and a Core mock for the Core group; mixing tiers produces scripts that tell you little, because students meet questions pitched for the wrong depth.

How do I make sure the mock is balanced across topics? Pull questions by the content areas and tally your marks by area before finalising. The usual failure is over-weighting electricity and motion and dropping thermal, space physics or electromagnetic induction entirely; a quick mark-by-area count catches it.

How do I keep marking a full mock manageable? Decide the marking plan before students sit it: auto-mark the multiple-choice and structured calculations to the Cambridge scheme, and review the extended explanations and practical reasoning yourself. That keeps the bulk of the mock off your weekend.

The bottom line

A 0625 mock predicts well when it copies the real assessment’s bones — more than one component type, the right tier, a practical dimension where possible, marks spread across all the content areas, and a difficulty curve that climbs. Build that once, save the blueprint, and plan the marking upfront, and a mock stops being an evening of photocopying and becomes a repeatable, genuinely diagnostic event.

Build a balanced 0625 mock from real past papers — free with one class →

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