A focused three-component revision and exam practice pack for SP6m, covering the complete Edexcel Separate Science Physics specification for nuclear fusion, the conditions required, the difficulty of building a fusion power station, and the comparison with fission (P6.43P–P6.46P).

Topic Mastery Sheet covers the definition of nuclear fusion (small nuclei combine to form a larger nucleus; combined mass slightly less than originals; mass difference converted to energy); the deuterium-tritium fusion equation as a worked example; fusion as the energy source of the Sun and all stars; a fission vs fusion comparison table (process, fuel, waste, conditions, current commercial status); the physical reason high temperatures and pressures are required (electrostatic repulsion between positively charged protons must be overcome - nuclei must move fast enough to get within range of the strong nuclear force); and why practical fusion power is not yet achievable (no material survives plasma temperatures; magnetic confinement required; net energy gain not yet achieved). The most common misconception - confusing fusion (the Sun; not yet commercial) with fission (power stations; commercial now) - is addressed directly.

Student Exam Practice Sheet includes a two-mark electrostatic repulsion explanation; a three-mark fusion description and stellar energy source question; and a two-mark question on why fusion is not currently used for electricity generation. Question format matches the Edexcel Higher test style.

Teacher Answer Key provides a complete mark scheme specifying that the electrostatic repulsion answer requires both the joining process (1) and the repulsion mechanism preventing it at low temperature (1), and that any two of three valid reasons score full marks on Q3.

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