A sample of solid carbon dioxide is placed in an open container at room temperature. It gradually disappears, and no liquid is seen in the container. The mass of the open container and its contents is measured on a balance during the process.
Name the change of state shown by these observations.
State what happens to the balance reading as the sample disappears and explain why.
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.