A student places small blocks of solid paraffin wax into a beaker of liquid olive oil.
The table below shows the density of solid paraffin wax and of liquid olive oil:
| Density (g/cm3\text{g/cm}^3g/cm3) | |
|---|---|
| Solid paraffin wax | 0.88 |
| Liquid olive oil | 0.92 |
Explain why the blocks of solid paraffin wax float in the liquid olive oil.
The volume of one block of solid paraffin wax is 4.5 cm34.5\text{ cm}^34.5 cm3. Calculate the mass of this block of wax.
Some solid paraffin wax is heated on a metal plate until it changes from a solid into a liquid.
State the name of the process when a solid changes into a liquid.
Describe the changes in the arrangement and motion of the particles as the wax changes from solid to liquid.
Later, some of the liquid wax is spilled on a very hot engine surface. State the name of the process that causes the liquid wax to slowly disappear into the air as a gas.
313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.