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OCR GCSE Combined Science topic questions

Practice questions per spec point, written in board paper style with mark-scheme answers.

  1. B1.1Cell structures: prokaryotic and eukaryotic cells, plant and animal cells, sub-cellular structures and microscopy6 questions →
  2. B1.2What happens in cells (and what do cells need): DNA, mitosis, the cell cycle, transport in cells (diffusion, osmosis, active transport)5 questions →
  3. B1.3Respiration: aerobic vs anaerobic, equations, response to exercise and oxygen debt5 questions →
  4. B1.4Photosynthesis: equation, factors affecting rate (limiting factors) and the inverse-square law for light intensity6 questions →
  5. B2.1Supplying the cell: surface area to volume, exchange surfaces, transport in plants (xylem, phloem, transpiration)5 questions →
  6. B2.2The challenges of size: human circulatory system, blood, the heart, blood vessels and double circulation3 questions →
  7. B3.1Coordination and control — the nervous system: receptors, neurones, CNS, reflex arcs and synaptic transmission5 questions →
  8. B3.2Coordination and control — the endocrine system: hormones, blood glucose regulation, type 1 and type 2 diabetes3 questions →
  9. B4.1Ecosystems: levels of organisation, biotic and abiotic factors, sampling and population studies3 questions →
  10. B4.2Cycles in ecosystems: carbon, water and decomposition; the impact of human activity on biodiversity3 questions →
  11. B5.1Inheritance: genes, alleles, dominant/recessive, Punnett squares, sex determination and inherited disorders4 questions →
  12. B5.2Natural selection and evolution: variation, mutations, evidence for evolution, fossils and antibiotic resistance3 questions →
  13. B6.1Monitoring and maintaining the environment: human impact, pollution, deforestation, conservation programmes3 questions →
  14. B6.2Feeding the human race: selective breeding, genetic engineering, food security and biotechnology3 questions →
  15. C1.1The particle model: states of matter, kinetic theory, density and changes of state3 questions →
  16. C1.2Atomic structure: protons, neutrons, electrons, isotopes and the development of the model of the atom5 questions →
  17. C2.1Purity and separating mixtures: filtration, crystallisation, distillation, chromatography and pure substances3 questions →
  18. C2.2Bonding: ionic, covalent and metallic bonding; structure of simple molecules, giant covalent and metallic structures6 questions →
  19. C3.1Introducing chemical reactions: balancing equations, conservation of mass, formula mass and percentage by mass3 questions →
  20. C3.2Energetics: exothermic and endothermic reactions, reaction profiles and bond-energy calculations5 questions →
  21. C4.1Predicting chemical reactions: the periodic table, trends in Groups 1, 7 and 0; the reactivity series5 questions →
  22. C4.2Identifying common gases and ions: tests for hydrogen, oxygen, carbon dioxide, chlorine; flame tests, hydroxide precipitates3 questions →
  23. C5.1Monitoring chemical reactions: concentration, moles and titrations (HT)3 questions →
  24. C5.2Controlling reactions: rate of reaction, collision theory, factors affecting rate and catalysts6 questions →
  25. C5.3Equilibria: reversible reactions, dynamic equilibrium and Le Chatelier’s principle3 questions →
  26. C6.1Improving processes and products: extraction of metals (electrolysis, blast furnace, biological methods), recycling and life-cycle assessment3 questions →
  27. C6.2Organic chemistry: hydrocarbons, alkanes, fractional distillation, cracking and alkenes3 questions →
  28. P1.1The particle model: kinetic theory, states of matter, density and the relationship between particle behaviour and physical properties3 questions →
  29. P1.2Changes of state: melting, boiling, evaporation; specific heat capacity and specific latent heat5 questions →
  30. P2.1Motion: distance, displacement, speed, velocity, acceleration; distance–time and velocity–time graphs5 questions →
  31. P2.2Newton’s laws: balanced and unbalanced forces, F = ma, free-body diagrams6 questions →
  32. P3.1Static and charge: electric fields, charging by friction and induction3 questions →
  33. P3.2Simple circuits: current, potential difference, resistance, Ohm’s law and IV characteristics3 questions →
  34. P3.3Series and parallel circuits: rules for current, p.d. and resistance6 questions →
  35. P4.1Wave behaviour: transverse and longitudinal waves; v = fλ; reflection, refraction and absorption3 questions →
  36. P4.2The electromagnetic spectrum: types, properties, uses and dangers across the spectrum3 questions →
  37. P4.3Radioactive emissions: alpha, beta, gamma, nuclear equations, half-life, irradiation vs contamination5 questions →
  38. P5.1Work done and energy transfer: stores, transfers, kinetic and potential energy, efficiency5 questions →
  39. P5.2Power and energy in everyday systems: P = E/t, power in appliances and the National Grid3 questions →
  40. P5.3Global energy resources: renewable and non-renewable resources and environmental impact3 questions →
  41. P6.1Physics on the move: forces in motion, vehicle safety and stopping distances3 questions →
  42. P6.2Powering Earth: electricity production, the National Grid, transformers and energy efficiency3 questions →