A student puts water in an open dish on a balance. The water has a mass of 24 g and a volume of 24 cm3. After some of the water evaporates, the balance reading is lower.
Calculate the density of the water before any of it evaporates.
Explain why the balance reading becomes lower as the water evaporates.
87 exam-style questions on Edexcel GCSE Physics 14.1 Density and states of matter, covering 14.1.1 Kinetic theory and states of matter, 14.1.2 Density, and 14.1.3 Density and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.