A student seals some crushed ice inside a plastic bag and puts the bag on a balance. The ice slowly melts.
Name the change of state that takes place.
State what happens to the reading on the balance while the ice melts.
Explain your answer to part b) in terms of the particles inside the bag.
The bag is opened and left in a warm room for a day. The reading on the balance falls. Explain why.
40 exam-style questions on AQA GCSE Physics 3.1 Changes of state and the particle model, covering 3.1.1 Density of materials and 3.1.2 Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.