Fig. 4.1 shows students on their way to school. Water puddles are present on the ground. After school, the puddles are no longer there and the ground is dry.
(a(i))[1]
State the name of the process that makes the puddles vanish.
(a(ii))[3]
Describe the process that makes the puddles vanish. Refer to molecules in your answer.
(b)[4]
Suggest two changes to the container design that would reduce the transfer of thermal energy from the hot liquid to its surroundings. For each change, state the thermal transfer process it reduces.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “evaporation” …