Year 9 science
Topics are arranged by the term they are taught. Pick the one you are doing in class: each has a lesson video, worked questions and practice at three levels.
Autumn term
- BiologyCell structure and transportLight and electron microscopes, magnification, eukaryotic and prokaryotic cells, specialised cells, diffusion, osmosis and active transport.100 questionsLesson video
- BiologyCell divisionDNA, genes and chromosomes, the cell cycle and mitosis, differentiation, stem cells and cloning.100 questionsLesson video
- ChemistryFundamental ideasAtoms, elements, compounds, molecules and mixtures, symbols and simple formulae, and separating mixtures by filtration, crystallisation, distillation and chromatography.100 questionsLesson video
- ChemistryCrude oil and fuelsCrude oil, hydrocarbons and the alkanes, fractional distillation, properties of fractions, combustion, cracking and alkenes.100 questionsLesson video
- ChemistryThe atmosphereHow the atmosphere formed and changed, its composition today, the greenhouse effect, climate change, carbon footprints and atmospheric pollutants.100 questionsLesson video
- ChemistryEarth’s resourcesFinite and renewable resources, drinking water and waste water treatment, life-cycle assessments, recycling, rusting, alloys, ceramics, composites and polymers.100 questionsLesson video
- PhysicsForcesContact and non-contact forces, free-body diagrams, resultant forces, mass and weight, gravitational field strength and Hooke’s law.100 questionsLesson video
- PhysicsDensity and pressureThe particle model, density of regular and irregular objects, changes of state, pressure in solids, liquids and gases, and upthrust.100 questionsLesson video
- PhysicsEnergyEnergy stores and transfers, kinetic and gravitational potential energy, conservation, dissipation, efficiency, power and energy resources.100 questionsLesson video
Spring term
- BiologyOrganising animals and plantsTissues, organs and organ systems, digestion and enzymes, blood and the heart, gas exchange, and transport and transpiration in plants.100 questionsLesson video
- BiologyNon-communicable diseaseLifestyle risk factors, correlation and causation, cancer, smoking, alcohol, diet, type 2 diabetes, BMI and treatments for heart disease.100 questionsLesson video
- ChemistryBonding and formulaeAtomic structure and electron shells, ions, ionic, covalent and metallic bonding, writing ionic formulae and balancing equations.100 questionsLesson video
- ChemistryReactivity of metalsThe reactivity series, reactions with water and acids, displacement, oxidation and reduction, and extracting metals from their ores.100 questionsLesson video
- ChemistryReactions of acidsThe pH scale, neutralisation, acids with metals, bases and carbonates, making soluble salts, balanced symbol equations, and strong and weak acids.100 questionsLesson video
- PhysicsSpaceThe Solar System, gravity and orbits, natural and artificial satellites, the life cycle of a star and nuclear fusion.100 questionsLesson video
- PhysicsSpeed, acceleration and Newton’s lawsSpeed and velocity, unit conversions, acceleration, distance-time and velocity-time graphs, and Newton’s three laws of motion.100 questionsLesson video
Summer term
- BiologyRespirationAerobic and anaerobic respiration, the effects of exercise, oxygen debt and the liver, metabolism, and cardiac output.100 questionsLesson video
- BiologyAdaptations and interdependenceCommunities and ecosystems, abiotic and biotic factors, competition, adaptations, sampling with quadrats and transects, and diversity.100 questionsLesson video
- PhysicsFields and electricityStatic electricity, electric fields, charge, current, potential difference and resistance, V = IR, and series and parallel circuits.100 questionsLesson video
- PhysicsWavesTransverse and longitudinal waves, amplitude, wavelength and frequency, wave speed, reflection, refraction and the electromagnetic spectrum.100 questionsLesson video