Key Stage 3 · Years 7 to 9
Science you
get to poke at
Biology, Chemistry and Physics for Years 7, 8 and 9 — built lesson by lesson, with something to press on every page.
Pick up where you left off
Start something new
- Life processes and what living things are made ofCells and organisation
- Using a microscopeCells and organisation
- Animal and plant cellsCells and organisation
- Specialised cellsCells and organisation
- Levels of organisationCells and organisation
- Unicellular organismsCells and organisation
- What the skeleton doesMovement: skeleton and muscles
- JointsMovement: skeleton and muscles
- Antagonistic muscle pairsMovement: skeleton and muscles
- Biomechanics: forces in the bodyMovement: skeleton and muscles
- A balanced dietNutrition and digestion
- Food testsNutrition and digestion
- Energy in food and what you needNutrition and digestion
- When diet goes wrongNutrition and digestion
- The digestive systemNutrition and digestion
- Enzymes in digestionNutrition and digestion
- Absorption and the small intestineNutrition and digestion
- Bacteria in the gutNutrition and digestion
- The gas exchange systemBreathing and gas exchange
- How breathing worksBreathing and gas exchange
- Alveoli: built for exchangeBreathing and gas exchange
- Exercise, asthma and smokingBreathing and gas exchange
- Stomata and gas exchange in plantsBreathing and gas exchange
- Human reproductive systemsReproduction
- Gametes and fertilisationReproduction
- The menstrual cycleReproduction
- Gestation, the placenta and birthReproduction
- Lifestyle and the developing foetusReproduction
- Flowers and pollinationReproduction
- Fertilisation, seeds and fruitReproduction
- Seed dispersalReproduction
- What drugs do to the bodyHealth and drugs
- Alcohol and smokingHealth and drugs
- Substance misuse and decisionsHealth and drugs
- The photosynthesis reactionPhotosynthesis
- Leaves built for the jobPhotosynthesis
- Testing a leaf for starchPhotosynthesis
- Why almost all life depends on itPhotosynthesis
- Aerobic respirationRespiration
- Why every cell respiresRespiration
- Anaerobic respiration in humansRespiration
- Fermentation and what we use it forRespiration
- Aerobic vs anaerobicRespiration
- Food chains and food websEcosystems and interdependence
- Predator and preyEcosystems and interdependence
- Disturbing a food webEcosystems and interdependence
- Pollinators and food securityEcosystems and interdependence
- Toxic build-up in a food chainEcosystems and interdependence
- Sampling an ecosystemEcosystems and interdependence
- Variation: continuous and discontinuousInheritance and DNA
- Chromosomes, genes and DNAInheritance and DNA
- How we worked out DNA's structureInheritance and DNA
- Passing it on: heredityInheritance and DNA
- What makes a speciesInheritance and DNA
- Variation and competitive successEvolution, extinction and biodiversity
- Natural selectionEvolution, extinction and biodiversity
- When the environment changes: extinctionEvolution, extinction and biodiversity
- Biodiversity and gene banksEvolution, extinction and biodiversity
- The particle modelParticles and their behaviour
- Solids, liquids and gasesParticles and their behaviour
- Changes of stateParticles and their behaviour
- Gas pressureParticles and their behaviour
- DiffusionParticles and their behaviour
- Testing the model: does it explain everything?Particles and their behaviour
- The atom: Dalton's modelAtoms, elements and compounds
- ElementsAtoms, elements and compounds
- CompoundsAtoms, elements and compounds
- Chemical symbolsAtoms, elements and compounds
- FormulaeAtoms, elements and compounds
- Conservation of massAtoms, elements and compounds
- Pure or mixture?Mixtures and separation
- Dissolving and solutionsMixtures and separation
- FiltrationMixtures and separation
- Evaporation and crystallisationMixtures and separation
- DistillationMixtures and separation
- ChromatographyMixtures and separation
- Proving something is pureMixtures and separation
- Chemical change vs physical changeChemical reactions
- Reactions rearrange atomsChemical reactions
- Word equationsChemical reactions
- Mass in a reactionChemical reactions
- Symbol equations and balancingChemical reactions
- CombustionTypes of reaction
- Thermal decompositionTypes of reaction
- OxidationTypes of reaction
- DisplacementTypes of reaction
- Which reaction is this?Types of reaction
- Acids and alkalisAcids and alkalis
- The pH scale and indicatorsAcids and alkalis
- NeutralisationAcids and alkalis
- Acid + metalAcids and alkalis
- Acids and carbonatesAcids and alkalis
- Making a pure dry saltAcids and alkalis
- CatalystsAcids and alkalis
- Energy and changes of stateEnergy changes in reactions
- Exothermic reactionsEnergy changes in reactions
- Endothermic reactionsEnergy changes in reactions
- Measuring a temperature changeEnergy changes in reactions
- Metals and non-metalsThe periodic table
- Mendeleev and the table that predictedThe periodic table
- Groups and periodsThe periodic table
- Group 1 — the alkali metalsThe periodic table
- Group 7 — the halogensThe periodic table
- Group 0 and why groups existThe periodic table
- Metal and non-metal oxidesThe periodic table
- The reactivity seriesMetals and materials
- Predicting displacementMetals and materials
- Getting metals out of rocksMetals and materials
- Ceramics, polymers and compositesMetals and materials
- Inside the EarthThe Earth and its atmosphere
- Three ways to make a rockThe Earth and its atmosphere
- The rock cycleThe Earth and its atmosphere
- A planet with limits: resources and recyclingThe Earth and its atmosphere
- What's in the airThe Earth and its atmosphere
- Carbon dioxide, humans and climateThe Earth and its atmosphere
- Energy storesEnergy transfers
- Energy transfers: before and afterEnergy transfers
- Conservation of energyEnergy transfers
- Heating and thermal equilibriumEnergy transfers
- ConductionEnergy transfers
- RadiationEnergy transfers
- InsulationEnergy transfers
- Simple machinesEnergy transfers
- Energy in foodEnergy at home
- Power ratings in wattsEnergy at home
- Calculating energy transferredEnergy at home
- Reading a fuel billEnergy at home
- Fuels and energy resourcesEnergy at home
- SpeedDescribing motion
- Distance–time graphsDescribing motion
- Relative motionDescribing motion
- What a force isForces
- Drawing and adding forcesForces
- Balanced and unbalancedForces
- What forces do to motionForces
- FrictionForces
- Air and water resistanceForces
- Moments: the turning effectForces
- Springs and Hooke's lawForces
- Non-contact forcesForces
- Pressure = force ÷ areaPressure
- Pressure in liquidsPressure
- Upthrust, floating and sinkingPressure
- Atmospheric pressurePressure
- Waves on water: what a wave isWaves and sound
- Transverse waves, reflection and superpositionWaves and sound
- How sound is madeWaves and sound
- Sound is longitudinalWaves and sound
- Frequency, pitch and loudnessWaves and sound
- Sound needs a mediumWaves and sound
- Echoes, reflection and absorptionWaves and sound
- Hearing and auditory rangeWaves and sound
- Ultrasound at workWaves and sound
- Light travelsLight
- Reflection: mirrors and scatteringLight
- RefractionLight
- Lenses and imagesLight
- The eye and the cameraLight
- Colour and the spectrumLight
- Why things look colouredLight
- Current and circuitsElectric circuits
- Series and parallelElectric circuits
- Current at a junctionElectric circuits
- Potential differenceElectric circuits
- ResistanceElectric circuits
- Conductors and insulatorsElectric circuits
- Building and measuring a circuitElectric circuits
- Charging by rubbingStatic electricity
- Forces between chargesStatic electricity
- Electric fieldsStatic electricity
- Magnets and polesMagnetism and electromagnetism
- Magnetic fieldsMagnetism and electromagnetism
- The Earth is a magnetMagnetism and electromagnetism
- ElectromagnetsMagnetism and electromagnetism
- How a motor worksMagnetism and electromagnetism
- DensityMatter and the particle model
- Brownian motionMatter and the particle model
- Temperature, particle motion and internal energyMatter and the particle model
- Why ice floatsMatter and the particle model
- Gravity and weightSpace
- Mass vs weightSpace
- Gravity between Earth, Moon and SunSpace
- The Sun, stars and galaxiesSpace
- Seasons and the tiltSpace
- How far is a light year?Space
Pick your year
Year 7
Cells, particles, forces and motion — the foundations everything else sits on.
Browse the six half termsYear 8
Reactions, body systems, electricity and waves. The biggest year of KS3.
Browse the six half termsYear 9
Inheritance, the periodic table and energy — the run-up to GCSE.
Browse the six half terms
Or go by subject
Biology
Cells and organisation · Movement: skeleton and muscles · Nutrition and digestion · Breathing and gas exchange · Reproduction · Health and drugs · Photosynthesis · Respiration · Ecosystems and interdependence · Inheritance and DNA · Evolution, extinction and biodiversity
Chemistry
Particles and their behaviour · Atoms, elements and compounds · Mixtures and separation · Chemical reactions · Types of reaction · Acids and alkalis · Energy changes in reactions · The periodic table · Metals and materials · The Earth and its atmosphere
Physics
Energy transfers · Energy at home · Describing motion · Forces · Pressure · Waves and sound · Light · Electric circuits · Static electricity · Magnetism and electromagnetism · Matter and the particle model · Space