A student places a glass containing ice-cold water on a digital balance in a warm, humid room. The total mass of the glass and its contents is recorded over four minutes. The results are shown in the table.
| Time / minutes | Mass / g |
|---|---|
| 0.0 | 150.0 |
| 1.0 | 150.3 |
| 2.0 | 150.6 |
| 3.0 | 150.9 |
| 4.0 | 151.2 |
Why does the mass of the glass and its contents increase?
Water vapor from the air condenses.
The water inside the glass freezes.
The water inside the glass evaporates.
The water inside the glass boils.
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.