Learning paths
- Lessons
- 97
- Topics
- 96
Free, no account neededA tour of Combined Science14 short steps.
Start lessonLosing required-practical marks?Six quick questions find the mark, then fix it.
Start the clinicThe course, in test order
Biology Paper 1
15 lessons
- 2 lessonsFreeCells: structure, types and specialisation
- Microscopy and magnification
- Chromosomes, mitosis and stem cells
- Diffusion, osmosis and active transport
- Cells, tissues, organs and organ systems
- Digestion, enzymes, the heart and blood
- Health, lifestyle and cancer
- Plant tissues and transport
- Pathogens: viral, bacterial and fungal diseases
- Protists, defences, vaccination and antibiotics
- Discovering and testing drugs
- Photosynthesis and its rate
- Respiration, exercise and metabolism
- Higher: limiting factors and oxygen debt
Biology Paper 2
15 lessons
- Homeostasis
- The nervous system and reflexes
- Hormones, blood glucose and contraception
- Higher: infertility treatment and negative feedback
- Higher: glucagon and the menstrual cycle hormones
- Reproduction, meiosis, DNA and inheritance
- Inherited disorders and sex determination
- Variation, evolution, selective breeding and genetic engineering
- Fossils, extinction and resistant bacteria
- Classifying living organisms
- Higher: full genetic crosses and genetic engineering
- Communities, abiotic and biotic factors, adaptations
- Food chains, sampling and material cycles
- Biodiversity, waste and land use
- Global warming and protecting biodiversity
Chemistry Paper 1
23 lessons
- Atoms, compounds, mixtures and the atomic model
- Atomic size, relative mass and electron structure
- The periodic table, metals and noble gases
- Group 1 and Group 7
- Higher: ionic equations and half equations
- Ionic and covalent bonding
- Metallic bonding
- States of matter and properties of substances
- Polymers, giant structures, metals and alloys
- Diamond, graphite, graphene and fullerenes
- Higher: limits of the particle model
- Conservation of mass and relative formula mass
- Concentration of solutions
- Higher: moles and balancing with moles
- Higher: limiting reactants
- Higher: explaining concentration
- Reactivity, extraction and reduction
- Acids, salts and pH
- Electrolysis
- Higher: redox, strong and weak acids, electrode half equations
- Higher: redox in acid reactions and electrolysis
- Exothermic and endothermic reactions, reaction profiles
- Higher: bond energy calculations
Chemistry Paper 2
14 lessons
- Rates of reaction, collisions and catalysts
- Reversible reactions and equilibrium
- Higher: equilibrium, concentration and temperature
- Higher: equilibrium and pressure
- Higher: tangents and rates in mol/s
- Crude oil, alkanes, cracking and alkenes
- Purity, formulations and chromatography
- Tests for gases
- The atmosphere, then and now
- Greenhouse gases, climate change and carbon footprints
- Atmospheric pollutants
- Resources, potable water and waste water
- Life cycle assessment and recycling
- Higher: phytomining and bioleaching
Physics Paper 1
14 lessons
- Energy stores, changes and power
- Energy transfers and efficiency
- National and global energy resources
- Higher: improving efficiency
- Circuit symbols, charge, current and resistance
- Series and parallel circuits
- Direct and alternating p.d., and mains electricity
- Electrical power, appliances and the National Grid
- Density and changes of state
- Internal energy, specific heat capacity and latent heat
- Particle motion in gases
- Atoms, isotopes and the model of the atom
- Radioactive decay, nuclear equations and half-life
- Higher: net decline after several half-lives
Physics Paper 2
16 lessons
- Scalars, vectors, forces and resultants
- Work done and energy transfer
- Forces and elasticity
- Distance, speed, velocity and distance-time graphs
- Acceleration and Newton's laws
- Stopping distance and reaction time
- Higher: momentum and its conservation
- Higher: resolving forces, circular motion and tangents
- Higher: velocity-time areas and inertia
- Higher: estimating braking forces
- Transverse and longitudinal waves
- Electromagnetic waves, refraction and uses
- Higher: wavefronts, radio waves and why each band suits its use
- Magnets and magnetic fields
- Electromagnetism
- Higher: Fleming's left-hand rule and electric motors