OCR•J250•Gateway Science
OCR GCSE Combined Science A
21 sections · 409 revision notes, with key terms, exam tips and past papers
Starts with B1.1a Light Microscopy and Staining Techniques.
Specification
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What’s on each paper: Biology Paper 1 · Biology Paper 2 · Chemistry Paper 1 · Chemistry Paper 2 · Physics Paper 1 · Physics Paper 2
Paper 1
Topic B1 Cell Level Systems
Cell Structures · Cellular Processes and Requirements · Cellular Respiration · Photosynthesis19 notes
B1.1 Cell Structures
B1.2 Cellular Processes and Requirements
B1.3 Cellular Respiration
Topic B2 Scaling Up Biological Systems
Cellular Supply and Transport · Challenges of Biological Size16 notes
B2.1 Cellular Supply and Transport
B2.2 Challenges of Biological Size
- B2.2a Exchange Surfaces and Surface Area to Volume Ratio
- B2.2b Substances Transported by Organisms
- B2.2c Human Circulatory System
- B2.2d Heart and Blood Vessel Adaptations
- B2.2e Adaptations of Red Blood Cells and Plasma
- B2.2f Water and Mineral Uptake in Plants
- B2.2g Transpiration and Translocation
- B2.2h Xylem and Phloem Adaptations
- B2.2i Environmental Effects on Water Uptake
- B2.2j Investigating Water Uptake with a Potometer
Topic B3 Organism Level Systems
Nervous System Coordination and Control · Endocrine System Coordination and Control · Maintaining Internal Environments13 notes
B3.1 Nervous System Coordination and Control
B3.2 Endocrine System Coordination and Control
B3.3 Maintaining Internal Environments
Paper 2
Topic B4 Community Level Systems
Ecosystems6 notes
Topic B5 Genes, Inheritance and Selection
Inheritance · Natural Selection and Evolution15 notes
B5.1 Inheritance
- B5.1a Key Genetic Terminology
- B5.1b The Genome
- B5.1c Genotype and Environmental Interactions
- B5.1d Mutations and Phenotypic Variants
- B5.1e Haploid and Diploid Cells
- B5.1f Meiosis and Gamete Formation
- B5.1g Single Gene Inheritance
- B5.1h Predicting Genetic Crosses
- B5.1i Human Sex Determination
- B5.1j Polygenic Inheritance
Topic B6 Global Challenges in Biology
Monitoring and Maintaining the Environment · Feeding the Human Race · Monitoring and Maintaining Health26 notes
B6.1 Monitoring and Maintaining the Environment
B6.2 Feeding the Human Race
B6.3 Monitoring and Maintaining Health
- B6.3a Health and Disease
- B6.3b Types of Diseases
- B6.3c Disease Interactions
- B6.3d Spread of Communicable Diseases
- B6.3e Reducing Disease Spread
- B6.3f Specific Infections and Diseases 2 notes
- B6.3g White Blood Cells and Platelets
- B6.3h Non-Specific Defence Systems
- B6.3i The Human Immune System
- B6.3j Vaccines and Medicines
- B6.3k Drug Discovery and Development
- B6.3l Non-Communicable Disease Factors
- B6.3m Treatments for Cardiovascular Disease
- B6.3n Lifestyle Impact on Disease Incidence
- B6.3o Cellular Basis of Cancer
- B6.3p Stem Cells in Medicine
- B6.3q Gene Technology in Medicine
- B6.3r Genomics in Modern Medicine
Paper 3
Topic C1 Particles
The Particle Model · Atomic Structure8 notes
C1.1 The Particle Model
Topic C2 Elements, Compounds, and Mixtures
Purity and Separating Mixtures · Chemical Bonding · Properties of Materials26 notes
C2.1 Purity and Separating Mixtures
- C2.1a Substance Purity
- C2.1b Melting Point Data
- C2.1c Relative Formula Mass
- C2.1d Empirical Formulas
- C2.1e Formulations and Alloys
- C2.1f Separation Processes
- C2.1g Chromatography Techniques
- C2.1h Chromatography Phases
- C2.1i Interpreting Chromatograms
- C2.1j Selecting Purification Techniques
- C2.1k Chromatography for Purity Testing
C2.2 Chemical Bonding
- C2.2a Metals and Non-Metals
- C2.2b Atomic Structure and Periodic Position
- C2.2c Electron Arrangement and Atomic Number
- C2.2d Nature and Arrangement of Chemical Bonds
- C2.2e Electrostatic Forces and Electron Transfer
- C2.2f Dot and Cross Diagrams
- C2.2g Limitations of Chemical Models
- C2.2h Reactions and Electron Arrangement
- C2.2i Development of the Periodic Table
Topic C3 Chemical Reactions
Introduction to Chemical Reactions · Reaction Energetics · Types of Chemical Reactions · Electrolysis34 notes
C3.1 Introduction to Chemical Reactions
- C3.1a Formulae of Elements and Compounds
- C3.1b Writing Chemical and Half Equations
- C3.1c Using the Periodic Table for Formulae
- C3.1d Deducing Compound Formulae from Ions
- C3.1e Balanced Ionic Equations
- C3.1f Using State Symbols
- C3.1g Gas Identification Tests
- C3.1h The Avogadro Constant and the Mole
- C3.1i Mass and Moles Relationship
- C3.1j Solution Concentration
- C3.1k Conservation of Mass
- C3.1l Mass Changes in Non-Enclosed Systems
- C3.1m Equation Stoichiometry and Limiting Reactants
- C3.1n Calculating Reactant and Product Masses
C3.2 Reaction Energetics
C3.3 Types of Chemical Reactions
- C3.3a Oxidation and Reduction (Oxygen)
- C3.3b Oxidation and Reduction (Electrons)
- C3.3c Ions in Acids and Alkalis
- C3.3d Neutralisation Reactions
- C3.3e Generalising Aqueous Neutralisation
- C3.3f Reactions of Acids with Carbonates and Metals
- C3.3g Acid Concentration and Strength
- C3.3h The pH Scale
- C3.3i Hydrogen Ion Concentration and pH
- C3.3j Logarithmic Nature of pH
- C3.3k Measuring pH
Paper 4
Topic C4 Predicting and Identifying Reactions
Predicting Chemical Reactions5 notes
Topic C5 Monitoring and Controlling Reactions
Controlling Reactions · Chemical Equilibria12 notes
C5.1 Controlling Reactions
- C5.1a Determining Reaction Rates
- C5.1b Interpreting Rate of Reaction Graphs
- C5.1c Factors Affecting Reaction Rates
- C5.1d Collision Theory and Reaction Rates
- C5.1e Surface Area to Volume Ratio
- C5.1f Characteristics of Catalysts
- C5.1g Identifying Catalysts
- C5.1h Catalytic Action and Activation Energy
- C5.1i Enzymes as Biological Catalysts
C5.2 Chemical Equilibria
Topic C6 Global Challenges in Chemistry
Improving Processes and Products · Interacting with Earth Systems20 notes
C6.1 Improving Processes and Products
- C6.1a Industrial Metal Extraction
- C6.1b Electrolysis in Metal Extraction
- C6.1c Biological Metal Extraction
- C6.1d Life-Cycle Assessments
- C6.1e Interpreting LCA Data
- C6.1f Recycling and Viability
- C6.1g Evaluating Recycling Factors
- C6.1h Fractional Distillation of Crude Oil
- C6.1i Mechanisms of Fractional Distillation
- C6.1j Alkane Homologous Series
- C6.1k Crude Oil as a Feedstock
- C6.1l Dependence on Hydrocarbons
- C6.1m Cracking Hydrocarbons
Paper 5
Topic P1 Matter
Particle Model · Changes of State14 notes
P1.1 Particle Model
P1.2 Changes of State
- P1.2a Conservation of Mass in Phase Changes
- P1.2b Physical vs. Chemical Changes
- P1.2c Heating and Internal Energy
- P1.2d Specific Heat Capacity and Latent Heat
- P1.2e Internal Energy Calculations
- P1.2f Energy Changes in Phase Transitions
- P1.2g Gas Molecular Motion, Temperature, and Pressure
- P1.2h Gas Temperature and Pressure Relationship
Topic P2 Forces
Motion · Newton's Laws · Forces in Action33 notes
P2.1 Motion
P2.2 Newton's Laws
- P2.2a Object Interactions
- P2.2b Force Pairs in Interactions
- P2.2c Vector Representation of Forces
- P2.2d Newton's First Law
- P2.2e Vector Diagrams and Equilibrium
- P2.2f Forces on Isolated Systems
- P2.2g Resultant Forces and Free Body Diagrams
- P2.2h Balanced Forces
- P2.2i Newton's Second Law Calculations
- P2.2j Inertia and Inertial Mass
- P2.2k Momentum and Collisions
- P2.2l Work Done and Energy Transfer
- P2.2m Calculating Energy Transfers
- P2.2n Power
- P2.2o Newton's Third Law
- P2.2p Circular Motion and Velocity
P2.3 Forces in Action
- P2.3a Multiple Forces and Deformation
- P2.3b Elastic vs. Plastic Deformation
- P2.3c Force and Extension Relationship
- P2.3d Linear and Non-Linear Extension
- P2.3e Calculating Spring Constant
- P2.3f Work Done in Stretching
- P2.3g Gravitational Fields
- P2.3h Weight and Gravitational Field Strength
- P2.3i Free Fall Acceleration
Topic P3 Electricity and Magnetism
Static and Charge · Simple Circuits · Magnets and Magnetic Fields30 notes
P3.1 Static and Charge
P3.2 Simple Circuits
- P3.2a Series and Parallel Circuits
- P3.2b Circuit Conventions and Symbols
- P3.2c Current, Resistance, and Potential Difference
- P3.2d Ohm's Law and Variable Resistance
- P3.2e Constant vs. Changing Resistance
- P3.2f Circuit Design for Exploring Resistance
- P3.2g Linear and Non-linear Circuit Elements
- P3.2h I-V Characteristics and Component Properties
- P3.2i Net Resistance in Series and Parallel
- P3.2j D.C. Circuit Calculations
- P3.2k Testing and Measurement Circuits
- P3.2l Power Transfer in Circuits
- P3.2m Advanced Circuit Problem Solving
P3.3 Magnets and Magnetic Fields
- P3.3a Magnetic Poles and Forces
- P3.3b Permanent vs. Induced Magnets
- P3.3c Magnetic Field Characteristics
- P3.3d Earth's Magnetic Core
- P3.3e Current-Induced Magnetic Fields
- P3.3f Field Strength Factors
- P3.3g Solenoids and Magnetic Enhancement
- P3.3h Motor Effect Forces
- P3.3i Fleming's Left-Hand Rule
- P3.3j Magnetic Force Calculations
- P3.3k Electric Motors
Paper 6
Topic P4 Waves and radioactivity
Wave behaviour · The electromagnetic spectrum · Radioactivity31 notes
P4.1 Wave behaviour
P4.2 The electromagnetic spectrum
- P4.2a Properties of Electromagnetic Waves
- P4.2b Energy Transfer by Electromagnetic Waves
- P4.2c Frequency and Wavelength Relationships
- P4.2d Electromagnetic Spectrum Groupings
- P4.2e Detection of Visible Light
- P4.2f Light as an Electromagnetic Wave
- P4.2g Practical Uses of Electromagnetic Waves
- P4.2h Hazards of Electromagnetic Waves
- P4.2i Radio Waves and Electrical Circuits
- P4.2j Interactions with Electromagnetic Waves
- P4.2k Velocity and Wave Effects
P4.3 Radioactivity
- P4.3a Atomic Nuclei Composition
- P4.3b Isotopes and Nuclear Mass
- P4.3c Conventional Nuclei Representation
- P4.3d Unstable Nuclei and Emissions
- P4.3e Emissions and Nuclear Changes
- P4.3f Radioactive Decay Equations
- P4.3g Balancing Nuclear Equations
- P4.3h Electron Arrangements and Excitation
- P4.3i Radiation Generation and Absorption
- P4.3j Half-Life and Radioactive Decay
- P4.3k Calculating Radioactive Decline
- P4.3l Radiation Penetration Properties
- P4.3m Contamination vs Irradiation
Topic P5 Energy
Work done · Power and efficiency12 notes
P5.1 Work done
Topic P6 Global Challenges in Physics
Physics on the move · Powering Earth15 notes
P6.1 Physics on the move
P6.2 Powering Earth
All papers
Topic CS7 Practical Skills
Practical Activity Groups17 notes
Practical Activity Groups
- B1 Microscopy
- B2 Sampling Techniques
- B3 Rates of Enzyme-Controlled Reactions
- B4 Photosynthesis
- B5 Microbiological Techniques
- C1 Electrolysis
- C2 Distillation
- C3 Separation Techniques
- C4 Production of Salts
- C5 Measuring Rates of Reaction
- P1 Materials
- P2 Forces
- P3 Motion
- P4 Waves 2 notes
- P5 Energy
- P6 Circuits
5e Working Scientifically
Development of Scientific Thinking · Experimental Skills and Strategies · Analysis and Evaluation · Scientific Vocabulary and Nomenclature · Demonstration of Scientific Skills33 notes
WS1.1 Development of Scientific Thinking
- WS1.1a Evolution of Scientific Methods and Theories
- WS1.1b Application of Scientific Models
- WS1.1c Power and Limitations of Science
- WS1.1d Ethical Issues in Science
- WS1.1e Applications of Science
- WS1.1f Implications of Scientific Developments
- WS1.1g Evidence-Based Decision Making
- WS1.1h Risk Evaluation in Science
- WS1.1i Peer Review and Scientific Communication
WS1.2 Experimental Skills and Strategies
WS1.3 Analysis and Evaluation
- WS1.3a Data Presentation Methods
- WS1.3b Data Translation
- WS1.3c Mathematical and Statistical Analysis
- WS1.3d Data Distribution and Uncertainty
- WS1.3e Data Interpretation
- WS1.3f Reasoned Explanations
- WS1.3g Objective Data Evaluation
- WS1.3h Error Identification
- WS1.3i Communication of Scientific Investigations
WS1.4 Scientific Vocabulary and Nomenclature
WS2 Demonstration of Scientific Skills
5 Physics equations
Physics Equations24 notes
5g Physics Equations
- PM1.1i Density Equation
- PM2.1i Distance Equation
- PM2.1ii Acceleration Equation
- PM2.1iv Kinetic Energy Equation
- PM2.2i Force Equation
- PM2.2ii Momentum Equation
- PM2.2iii Work Done Equation
- PM2.2iv Mechanical Power Equation
- PM2.3i Hooke's Law Equation
- PM2.3iii Weight Equation
- PM2.3iv Gravitational Potential Energy Equation
- PM3.1i Charge Flow Equation
- PM3.2i Ohm's Law Equation
- PM3.2ii Electrical Energy Equation
- PM3.2iii Electrical Power Equations
- PM3.2iv Power and Energy Equation
- PM4.1i Wave Equation
- PM5.2i Efficiency Equation
- PM1.2i Specific Heat Capacity Equation
- PM1.2ii Specific Latent Heat Equation
- PM2.1iii Kinematic Equation
- PM2.3ii Elastic Potential Energy Equation
- PM3.3i Magnetic Force Equation
- PM6.2i Transformer Power Equation
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