A student needs to measure the thickness of a thin metal sheet as precisely as possible. Which instrument should the student use?
A metre rule with a resolution of 1 mm
A 30 cm ruler with a resolution of 1 mm
A micrometer with a resolution of 0.01 mm
A pair of callipers with a resolution of 0.1 mm
40 exam-style questions on AQA GCSE Physics 3.1 Changes of state and the particle model, covering 3.1.1 Density of materials and 3.1.2 Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.