Which method should be used to determine the volume of a small, irregularly shaped stone?
Measure its longest and shortest widths with a ruler
Lower it into water and measure the water displaced
Measure its widest part using a pair of callipers
Roll it along a bench and measure the distance moved
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.