Matter exists in three states: solid, liquid, and gas.
During a cold night, a puddle of water on a driveway freezes into ice.
In which of the three states is:
(i) the water in the puddle before it freezes,
(ii) the frozen ice,
(iii) the water vapour in the air above the puddle?
All of the following words are names of processes that can occur during a change of state:
boiling, condensation, evaporation, melting, solidification \text{boiling, ~ condensation, ~ evaporation, ~ melting, ~ solidification} boiling, condensation, evaporation, melting, solidificationState which of these is used to describe what happens to the liquid water as it turns into ice.
When the liquid water turns into ice, what happens to the energy stored in the water?
44 exam-style questions on CIE IGCSE Physics 2.1.1 States of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.