KS3 & GCSE Science
40 KS3 & GCSE explainers and guides.
- Acids, Bases and the pH Scale: KS3 Chemistry Guide
A clear KS3 chemistry guide to acids, bases, alkalis, and the pH scale: what they are, how to test them, neutralisation reactions, and everyday examples.
- Cells, Tissues and Organs: KS3 Biology Guide
A clear KS3 biology guide to cells, tissues and organs: the hierarchy of organisation, animal vs plant cells, cell specialisation, and major organ systems.
- Chemical vs Physical Changes: KS3 Chemistry Comparison Guide
A KS3 chemistry guide comparing chemical and physical changes: definitions, signs of a chemical reaction, worked examples, and the common misconception about dissolving.
- Combustion and Burning Fuels: KS3 Chemistry Guide
A clear KS3 chemistry guide to combustion and burning fuels: complete vs incomplete combustion, products formed, fossil fuels, and environmental impact.
- Density Explained: KS3 Physics Guide
A clear KS3 physics guide to density: what it means, how to calculate it using the formula, why objects float or sink, and how to measure density practically.
- Electricity and Circuits: KS3 Physics Guide
A KS3 physics guide to electricity and circuits: current, voltage, resistance, series and parallel circuits, and how to use circuit symbols and Ohm's Law.
- Element, Compound or Mixture? KS3 Chemistry Explained
A clear KS3 chemistry guide to elements, compounds, and mixtures: definitions, how to tell them apart, worked examples, and tips for sorting them in an exam.
- Energy Resources: Renewable and Non-Renewable KS3 Physics
A clear KS3 physics guide to energy resources: the difference between renewable and non-renewable sources, how each works, and their advantages and disadvantages.
- Energy Stores and Transfers: KS3 Physics Guide
A complete KS3 physics guide to energy stores and energy transfers: the eight stores, four pathways, worked examples, conservation of energy, and key exam vocabulary.
- Food Chains and Ecosystems: KS3 Biology Guide
A clear KS3 biology guide to food chains, food webs, and ecosystems: producers, consumers, trophic levels, predator-prey cycles, and the role of decomposers.
- Forces and Friction: KS3 Physics Guide
A clear KS3 physics guide to forces and friction: contact and non-contact forces, resultant forces, Newton's laws, and how friction affects motion in everyday life.
- Heat Transfer: Conduction, Convection and Radiation — KS3 Physics Guide
A complete KS3 physics guide to heat transfer by conduction, convection, and radiation: how each process works, real-world examples, and key differences for Year 8 exams.
- How to Revise KS3 Science Effectively (A Parent's Guide)
A practical guide to revising KS3 science: a step-by-step method covering biology, chemistry and physics, with active-recall techniques that actually work.
- Inheritance and DNA: KS3 Biology Guide to Genes, Chromosomes and Variation
A clear KS3 biology guide to inheritance and DNA: chromosomes, genes, alleles, dominant and recessive traits, and how variation is passed from parent to offspring.
- Light and Reflection: KS3 Physics Explained
A KS3 physics guide to light and reflection: how light travels, the law of reflection, how mirrors form images, and the difference between reflection and refraction.
- Magnets and Magnetism: KS3 Physics Guide
A clear KS3 physics guide to magnets and magnetism: magnetic fields, poles, magnetic materials, permanent versus induced magnets, and how electromagnets work.
- Metals and Non-Metals: KS3 Chemistry Guide
A clear KS3 chemistry guide to metals and non-metals: their physical and chemical properties, where they sit on the periodic table, and how they react.
- Particle Model of Matter: KS3 Chemistry Guide
A complete KS3 guide to the particle model of matter: solids, liquids, and gases, how particles are arranged, state changes, and common exam misconceptions to avoid.
- Parts of an Animal Cell: KS3 Biology Guide
A complete KS3 biology guide to animal cell structure: the nucleus, cytoplasm, cell membrane, and mitochondria — with functions, diagrams in words, and exam tips.
- Photosynthesis Explained: KS3 Biology Guide
Everything KS3 students need to know about photosynthesis: the word equation, what plants need, where it happens in the leaf, and how to answer exam questions.
- Plant Structure and Function: KS3 Biology Guide
A clear KS3 biology guide to plant structure and function: roots, stems, leaves, flowers, and how each part helps the plant survive, grow, and reproduce.
- Pressure in Solids, Liquids and Gases: KS3 Physics Guide
A clear KS3 physics guide to pressure in solids, liquids, and gases: how to calculate pressure, why it varies with depth, and real-world applications.
- Reproduction in Humans: KS3 Biology Guide to Puberty, Fertilisation and Development
A clear KS3 biology guide to human reproduction: puberty, the reproductive system, fertilisation, embryo development, and the stages from conception to birth.
- Respiration Explained: KS3 Biology Guide
A clear KS3 biology guide to aerobic and anaerobic respiration: the word equations, what happens in cells, how it differs from breathing, and exam tips.
- Separating Mixtures: Filtration and Distillation KS3
A KS3 chemistry guide to separating mixtures: filtration, distillation, evaporation, and chromatography explained with worked examples and exam tips.
- Sound Waves Explained: KS3 Physics Guide
A clear KS3 physics guide to sound waves: how sound travels, frequency, amplitude, wavelength, wave speed, and how the human ear detects sound.
- Speed, Distance and Time: KS3 Physics Guide
A complete KS3 physics guide to speed, distance, and time: the formula triangle, worked examples with calculations, units, and tips for rearranging the equation.
- States of Matter and Changes of State: KS3 Science
A KS3 science guide to the three states of matter and changes of state: melting, boiling, condensation, and freezing explained using the particle model.
- The Carbon Cycle: KS3 Biology Guide to How Carbon Moves Through Ecosystems
A clear KS3 biology guide to the carbon cycle: photosynthesis, respiration, decomposition, combustion, and how human activity disrupts carbon balance in ecosystems.
- The Circulatory System and the Heart: KS3 Biology Guide
A clear KS3 biology guide to the circulatory system and the heart: structure, blood vessels, double circulation, and how blood transports oxygen around the body.
- The Eye and How We See: KS3 Biology Guide
A clear KS3 biology guide to the eye and how we see: the structure of the human eye, how light is focused on the retina, and common vision problems explained.
- The Human Digestive System: KS3 Biology Guide
A clear KS3 biology guide to the human digestive system: organs, enzymes, and how food is broken down and absorbed from mouth to large intestine.
- The Periodic Table Explained: KS3 Chemistry Guide
A clear KS3 chemistry guide to the periodic table: how it is organised, what groups and periods mean, patterns in properties, and key elements to know.
- The Reactivity Series of Metals: KS3 Chemistry
A clear KS3 chemistry guide to the reactivity series: the order of metals, reactions with water and acid, displacement reactions, and how to predict chemical behaviour.
- The Respiratory System and Breathing: KS3 Biology Guide
A clear KS3 biology guide to the respiratory system: the organs involved in breathing, gas exchange in the lungs, and how oxygen reaches your cells.
- The Rock Cycle and Types of Rock: KS3 Science Guide
A clear KS3 science guide to the rock cycle and types of rock: how igneous, sedimentary, and metamorphic rocks form, their properties, and how rocks change over time.
- The Skeleton and Muscles: KS3 Biology Explained
A KS3 biology guide to the skeleton and muscles: the functions of the skeleton, types of joints, and how muscles work in antagonistic pairs to produce movement.
- The Solar System and Gravity: KS3 Physics Guide
A clear KS3 physics guide to the solar system and gravity: the eight planets, orbits, weight versus mass, and gravitational field strength with worked examples.
- What Is Diffusion? KS3 Biology Explained
A clear KS3 biology guide to diffusion: the definition, the concentration gradient, real examples in cells, and how to answer exam questions accurately.
- What Is Osmosis? KS3 Biology Explained
A clear KS3 biology guide to osmosis: what it is, how it works across a partially permeable membrane, and why it matters in plant and animal cells.