OCR GCSE Science A Gateway Revision Guide

OCR Gateway GCSE Combined Science (J250) Biology (J247) Chemistry (J248) Physics (J249)


OCR’s GCSE Science A (Gateway) counts as two GCSEs and covers Biology, Chemistry and Physics, plus practical skills. You’ll take either all Foundation tier papers or all Higher tier papers - you can’t mix tiers. 


📑 How Many Papers Are There?


For OCR Science A (Gateway), you will sit 6 exam papers in total:

  • 🧬 Biology – 2 papers

  • 🧪 Chemistry – 2 papers

  • Physics – 2 papers


Each subject is split into Paper 1 and Paper 2, covering different topics.


👉 Foundation and Higher tiers study the same topics, but:

  • Higher tier goes into more depth

  • Higher includes more complex explanations, maths and application questions


🧪 Common Features Across All Papers

  • Practical skills (CS7) are assessed in all exams

  • Data analysis, evaluation and calculations are integrated

  • Later papers assume knowledge from earlier topics

  • All papers contribute equally to the final Combined Science grade



OCR-Gateway GCSE  Biology Paper 1


  • 📌Content: for both foundation and higher papers.


  • B1: Cell-level systems

  • Cell Structures
  • What happens in cells?
  • Respiration
  • Photosynthesis


B2: Scaling up

  • Supplying the cell
  • Diffusion, osmosis, active transport
  • Circulatory system in humans (heart, blood vessels)
  • Transport systems in plants (xylem, phloem)


B3: Organism-level systems

  • Digestive system and absorption
  • Nervous system and reflexes

  • Hormonal control (e.g., blood glucose regulation)



  • Question Types: 


  • Multiple-choice questions (recall of cell structures, diffusion, enzyme function)

  • Short-answer questions (e.g., describe osmosis, name organ systems)

  • Structured questions (multi-part on digestion, circulation, nervous system)

  • Data interpretation (graphs on enzyme activity, heart rate tables)

  • Math-based questions (calculating surface area-to-volume ratios)

  • Practical-based questions (variables in osmosis experiments, accuracy improvements)


OCR GCSE Combined Science A Gateway Biology Paper 2


  • 📌Content: for both foundation and higher papers.


B4: Community-level systems

  • Ecosystems and interactions
  • Food chains, webs and energy transfer
  • Biodiversity and its importance


B5: Genes, inheritance and selection

  • DNA structure and function
  • Genetic variation and inheritance patterns
  • Natural selection and evolution


B6: Global challenges

  • Human impact on ecosystems
  • Climate change and sustainability
  • Disease transmission and prevention
  • Biotechnology and its applications


  • Question Types: 


  • Multiple-choice questions (ecosystem terms, inheritance patterns)

  • Extended response questions (6-mark: explain natural selection or biodiversity importance)

  • Data analysis (population graphs, genetic cross tables)

  • Synoptic questions (linking genetics to global challenges)

  • Practical-based questions (sampling methods, evaluating fieldwork)


OCR GCSE Combined Science A Gateway Chemistry Paper 1


📑 Paper 1: Chemistry


  • Duration: 1 hour 10 minutes


  • 🏆Marks: 60 marks (16.7% of total grade)


  • 📌Content: for both foundation and higher papers.


C1: Particles

  • States of matter and particle model
  • Changes of state and energy transfers
  • Atomic structure


C2: Elements, compounds and mixtures

  • Chemical bonding (ionic, covalent, metallic)
  • Properties of substances based on bonding
  • Purity and separating mixtures


C3: Chemical reactions

  • Writing and balancing equations
  • Types of reactions (neutralisation, displacement)
  • Energy changes in reactions (endothermic/exothermic)
  • Electrolysis


  • Question Types: 


  • Multiple-choice questions (states of matter, bonding types)


  • Symbol equation questions (write and balance equations)


  • Calculation questions (relative formula mass, energy changes)


  • Structured questions (bonding diagrams, particle models)


  • Practical-based questions (accuracy in separation techniques)


OCR GCSE Combined Science A Chemistry Paper 1 Foundation | Past Papers


OCR GCSE Combined Science A Chemistry Paper 1 Higher | Past Papers


OCR GCSE Combined Science A Gateway Chemistry Paper 2


📑 Paper 2: Chemistry


  • Duration: 1 hour 10 minutes


  • 🏆Marks: 60 marks (16.7% of total grade)


  • 📌Content: for both foundation and higher papers.


C4: Predicting and identifying reactions

  • Predicting chemical reactions
  • The Periodic Table


C5: Monitoring and controlling reactions

  • Rates of reaction and factors affecting them
  • Reversible reactions and equilibrium


C6: Global challenges

  • Extraction and use of resources
  • Pollution and environmental impact
  • Sustainable chemistry and recycling


  • Question Types: 


  • Multiple-choice questions (reactivity series, tests for ions)


  • Extended response questions (evaluate sustainable chemistry methods)


  • Calculation questions (rates of reaction, equilibrium)


  • Data interpretation (graphs of reaction rates)


  • Synoptic questions (linking chemical reactions to global challenges)

  • Practical-based questions (designing experiments for rate of reaction)


OCR GCSE Combined Science A Chemistry Paper 2 Foundation | Past Papers


OCR GCSE Combined Science A Chemistry Paper 2 Higher | Past Papers


OCR GCSE Combined Science A Gateway Physics Paper 1


📑 Paper 1: Physics


  • Duration: 1 hour 10 minutes


  • 🏆Marks: 60 marks (16.7% of total grade)


  • 📌Content: for both foundation and higher papers.


P1: Matter

  • Density and particle model
  • Changes of state and internal energy


P2: Forces

  • Motion graphs and calculations
  • Newton’s laws and applications
  • Forces in action


P3: Electricity and magnetism

  • Static charge
  • Current, voltage and resistance
  • Series and parallel circuits
  • Magnetism and electromagnetism basics


  • Question Types: 


  • Multiple-choice questions (density, forces, circuit symbols)


  • Calculation questions (speed, pressure, resistance)


  • Graph interpretation (motion graphs)


  • Structured questions (force diagrams, circuit analysis)


  • Practical-based questions (accuracy in measuring density)


OCR GCSE Combined Science A Gateway Physics Paper 2


📑 Paper 2: Physics


  • Duration: 1 hour 10 minutes


  • 🏆Marks: 60 marks (16.7% of total grade)


  • 📌Content: for both foundation and higher papers.


P4: Waves and radioactivity

  • Properties of waves (frequency, wavelength)
  • The electromagnetic spectrum
  • Reflection, refraction, and diffraction
  • Nuclear radiation and half-life


P5: Energy

  • Energy stores and transfers
  • Efficiency and energy resources


P6: Global challenges

  • Renewable vs non-renewable energy
  • Space physics (solar system, satellites)

  • Climate and energy demands


  • Question Types: 


  • Multiple-choice questions (wave properties, energy resources)


  • Extended response questions (evaluate renewable energy sources)


  • Calculation questions (wave speed, efficiency)


  • Data interpretation (radioactive decay graphs)


  • Synoptic questions (energy transfer linked to global challenges)


  • Practical-based questions (designing wave experiments)




👉  How to revise for OCR GCSE Combined Science

Here are some top tips to make your revision more effective:


1. Know the Specification Topics 📋

Make sure you revise every topic, even ones you find tricky. Not all topics appear equally, but anything can come up!


2. Practise Past Paper Questions 📝

Doing exam-style questions helps you learn:

  • How questions are worded

  • What examiners are looking for

  • How to manage your time

You will find the links to past papers on this page!


3. Revise Required Practicals 🔬

You don’t need to memorise full write-ups, but you do need to understand:

  • Methods

  • Variables

  • How to improve accuracy

  • How to analyse results


4. Build Your Maths Confidence

GCSE science includes maths like:

  • Rearranging equations

  • Drawing and interpreting graphs

  • Percentages and ratios

Regular practice makes a huge difference!


5. Use Active Revision Techniques 🧠

Try methods that make you think, not just read:

  • Flashcards

  • Teaching someone else

  • Self-quizzing

  • Timed questions


6. Use Smart Exam Technique
⏱️

  • Read questions carefully

  • Highlight command words

  • Show workings in calculations

  • Check units and labels

  • If you’re stuck, move on and come back


🎉 Final Thought

Six papers might sound like a lot, but with steady revision, practice questions and confidence, you can absolutely smash OCR Gateway Combined Science A 💪
You’ve got this! 🚀