A block of dry ice (solid carbon dioxide) is left on a scale in an open room. Over time, some of the dry ice sublimes directly into carbon dioxide gas and escapes into the surrounding air.
What happens to the mass and to the weight of the remaining block of dry ice?
Mass decreases, weight decreases
Mass decreases, weight stays the same
Mass stays the same, weight decreases
Mass stays the same, weight stays the same
209 exam-style questions on CIE IGCSE Physics Mass and weight, covering Mass and weight. Each one has a worked solution and a mark scheme showing where the marks go.