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Cambridge O Level · 7 subjects
- 4037Additional MathematicsSimulations
- 5090Biology
- 7115Business Studies
- 5070ChemistrySimulationsPractical Lab
- 2210Computer ScienceSimulations
- 4024Mathematics (Syllabus D)Simulations
- 5054PhysicsSimulationsPractical Lab
- 0452Accounting
- 0606Additional MathematicsSimulations
- 0610Biology
- 0264Business
- 0620ChemistrySimulationsPractical Lab
- 0478Computer ScienceSimulations
- 0455Economics
- 0580MathematicsSimulations
- 0625PhysicsSimulationsPractical Lab
- 9700BiologySimulations
- 9701ChemistrySimulationsPractical Lab
- 9709MathematicsSimulations
- 9702PhysicsSimulationsPractical Lab
Practical Lab
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Chemistry and Physics practicals for O Level, IGCSE and AS Level, on a virtual bench. Do the experiment yourself, then answer the paper's questions with your own results.
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Simulations
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470 interactive labs for O Level, IGCSE and AS & A Level Physics, Chemistry, Mathematics, Additional Mathematics, Computer Science and Biology, by syllabus chapter. Free, and no sign-in needed.
Browse all simulationsO Level Physics · 6.1
Orbits and the Solar System
The planets go round the Sun at their real relative periods, and a comet swings in on a stretched orbit.
- The further a planet is from the Sun, the longer its orbital period.
- The comet is fastest nearest the Sun, where gravitational potential energy has become kinetic energy.
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- PractiseTimed mock examsSet the timer, stay focused, then see a clear evaluation of the work you just finished.Take a mock
- PractiseTopical practiceMultiple choice marked the moment you answer. Structured questions with the real mark scheme revealed step by step.Start practising
- LearnRevision notesNotes written against the syllabus, with the exam warnings examiners keep repeating.Open the notes
- PractisePast papersCambridge archive by year and paper, linked to the chapters they test.Browse papers
- RetainRevision vaultEvery mistake becomes a timely review, so hard ideas get another chance before exam day.Open the vault
- TrackCompetency profileSee strengths, gaps and the one chapter that deserves your attention next.See your progress
- TrackStudy plannerPlan the week around your next exam and tick work off as you go.Plan your week
- ToolsCalculatorsA scientific calculator in the fx-991ES PLUS layout, and a graphing calculator to plot, find roots and intersections.Open the calculator
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