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BBC Bitesize

Electrical component symbols - Electric circuits – WJEC - GCSE Physics (Single Science) Revision - WJEC - BBC BitesizeLearn how engineers design electrical circuits by calculating the voltage, current and resistance of electrical components.

Energy sources - Generating electricity – WJEC - GCSE Physics (Single Science) Revision - WJEC - BBC BitesizeLearn how we generate electricity and the environmental impact of electricity generation.

Cells - Cells and movement across membranes – WJEC - GCSE Biology (Single Science) Revision - WJEC - BBC BitesizeRevise the structures of cells and the difference between diffusion, osmosis and active transport. Study the factors that affect enzyme action.

Aerobic respiration - The respiratory system in humans – WJEC - GCSE Biology (Single Science) Revision - WJEC - BBC BitesizeStudy the two types of respiration, aerobic and anaerobic. Revise the structure and function of the lungs.

Conduction - Making use of energy – WJEC - GCSE Physics (Single Science) Revision - WJEC - BBC BitesizeLearn how transfer of heat energy occurs and how this can be minimised to save energy when heating your house.

Energy - Energy forms - CCEA - GCSE Combined Science Revision - CCEA Double Award - BBC BitesizeEnergy cannot be created or destroyed but it can be transferred, dissipated or stored in different ways.

Renewable energy - Energy resources - CCEA - GCSE Combined Science Revision - CCEA Double Award - BBC BitesizeThere are two types of energy resource: renewable and non-renewable.

Natural water supplies - Water purification - GCSE Chemistry (Single Science) Revision - WJEC - BBC BitesizeLearn how water is made safe to use and drink with BBC Bitesize GCSE Chemistry (WJEC).

Structure of the Earth - The Earth - GCSE Chemistry (Single Science) Revision - WJEC - BBC BitesizeLearn about the structure of the Earth, Wegener's continental drift theory, and plate tectonics with this BBC Bitesize GCSE Chemistry (WJEC) revision guide

Composition of the atmosphere - The atmosphere and the environment - GCSE Chemistry (Single Science) Revision - WJEC - BBC BitesizeLearn about the composition of the atmosphere and how human activity has changed, and continues to change our atmosphere today with BBC Bitesize.

Hard and soft water - Hard water - GCSE Chemistry (Single Science) Revision - WJEC - BBC BitesizeLearn about the hardness of water with BBC Bitesize GCSE Chemistry (WJEC).

Metal extraction and the reactivity series - The reactivity series of metals - GCSE Chemistry (Single Science) Revision - WJEC - BBC BitesizeLearn about the processes that are related to extraction of metals and learn about the reactivity series with BBC Bitesize GCSE Chemistry (WJEC).

Oxidation and reduction - Redox, extraction of iron and transition metals - GCSE Chemistry (Single Science) Revision - WJEC - BBC BitesizeLearn about Redox, extraction of iron, and transition metals with BBC Bitesize GCSE Chemistry (WJEC).

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