Combined Science study guides

An overview of the Acids, metals and energy module in WJEC GCSE Science Double Award (Unit 5, Chemistry 2), mapping acids, bases and the pH scale, the reactions of acids and preparing salts, the reactivity series and extraction, electrolysis, and energy changes in reactions.

An overview of the Bonding and properties module in WJEC GCSE Science Double Award (Unit 5, Chemistry 2), mapping ionic bonding, covalent bonding, giant covalent and metallic structures, and linking structure to properties.

An overview of the Cells and respiration module in WJEC GCSE Science Double Award (Unit 1, Biology 1), mapping cell structure and organisation, specialised cells and microscopy, movement across membranes, aerobic and anaerobic respiration, and the breathing system and gas exchange.

An overview of the Cells, genetics and evolution module in WJEC GCSE Science Double Award (Unit 4, Biology 2), mapping cell division and stem cells, DNA and inheritance, variation and evolution, and classification and biodiversity.

An overview of the Digestion and circulation module in WJEC GCSE Science Double Award (Unit 1, Biology 1), mapping the digestive system, digestive enzymes and food tests, absorption of digested food, the heart and circulation, and blood and circulatory health.

An overview of the Electricity and the grid module in WJEC GCSE Science Double Award (Unit 3, Physics 1), mapping current, potential difference and resistance, series and parallel circuits, domestic electricity and safety, generators and transformers, and the National Grid.

An overview of the Energy resources and efficiency module in WJEC GCSE Science Double Award (Unit 3, Physics 1), mapping energy resources and power stations, energy transfer and efficiency, and reducing energy loss in the home.

An overview of the Forces and motion module in WJEC GCSE Science Double Award (Unit 6, Physics 2), mapping distance, speed and acceleration, Newton's laws and forces, work, energy and power, and stopping distances and safety.

An overview of the Kinetic theory module in WJEC GCSE Science Double Award (Unit 6, Physics 2), mapping the particle model and changes of state, specific heat and changes of state, and gas pressure and temperature.

An overview of the Microorganisms and disease module in WJEC GCSE Science Double Award (Unit 4, Biology 2), mapping pathogens and disease, defence and the immune system, vaccines and antibiotics, and culturing microorganisms.

An overview of the Organic and industrial chemistry module in WJEC GCSE Science Double Award (Unit 5, Chemistry 2), mapping crude oil and fractional distillation, alkanes, alkenes and cracking, reversible reactions and equilibrium, and the Haber process.

An overview of the Plants and ecosystems module in WJEC GCSE Science Double Award (Unit 1, Biology 1), mapping photosynthesis and limiting factors, leaf structure and plant transport, transpiration, food chains and ecosystems, and the carbon and nitrogen cycles.

An overview of the practical and enquiry skills for the WJEC GCSE Science Double Award practical assessment (Unit 7), mapping planning an investigation, carrying out and recording, and analysing and evaluating, plus how Unit 7 is assessed.

An overview of the Rate of chemical change module in WJEC GCSE Science Double Award (Unit 2, Chemistry 1), mapping rates of reaction and collision theory, the factors affecting rate and catalysts, and measuring the rate of reaction.

An overview of the Response and regulation module in WJEC GCSE Science Double Award (Unit 4, Biology 2), mapping the nervous system and reflexes, the eye and focusing, hormones and blood glucose, and homeostasis and temperature regulation.

An overview of the Space and radioactivity module in WJEC GCSE Science Double Award (Unit 6, Physics 2), mapping the Solar System and stars, types of radiation, half-life, and nuclear fission and fusion.

An overview of the Substances and atomic structure module in WJEC GCSE Science Double Award (Unit 2, Chemistry 1), mapping elements, compounds and mixtures, chemical reactions and equations, atomic structure and isotopes, electronic structure, and the Periodic Table and its groups.

An overview of The Earth and its resources module in WJEC GCSE Science Double Award (Unit 2, Chemistry 1), mapping water treatment and solubility, the Earth's atmosphere and its evolution, climate change and air quality, and limestone and its uses.

An overview of the Waves module in WJEC GCSE Science Double Award (Unit 3, Physics 1), mapping the features of waves, reflection and refraction, total internal reflection, and the electromagnetic spectrum.