These are my (Hannah's) thoughts on changing of state.

1. MW5093
The three states of matter are represented in the diagrams below.
A B C
a) Identify the diagram that represents
i) A solid. - A
ii) Steam. –C
b) Name a substance that could be represented by diagram B Liquid.
c) Explain why substances represented by diagram C can be compressed, but the others
cannot.
Because they are as compressed as they can get and originally the particles are far apart
d) Condensation is a change of state. Complete the condensation equation below by putting
one letter from the diagrams above (A, B, C) into each circle.
C B

2. MW5093
Scoring: Answers/Responses: Y10 (11/02)
1 mark a) i) A very easy
(for both correct) ii) C
1 mark b) Any liquid, e.g., water. moderate
1 mark c) The particles in C are far apart. difficult
1 mark The particles in C can be moved closer. difficult
1 mark The particles in A and B are already close difficult
and can’t get closer.
1 mark d) B
moderate
C
Total: 6 marks
Diagnostic information
Analysis of responses
d) Percentage of students giving each answer.
C → B: 49%
C → A: 7%
A → B: 10%
A → C: 17%
Missing/No answer: 17%