Physics & Chemistry Exam — Solid, Liquid, Gas and Changes of State
Learn to identify the three states of matter, their physical properties and all changes of state — melting, solidification, evaporation, condensation and sublimation — with multiple-choice questions adapted for Primary and Secondary.
Changes of state are among the first scientific phenomena a child can observe directly: melting ice, a misted-up mirror, salt left behind when seawater dries. Understanding what happens at the particle level in each case is the gateway to all the physics and chemistry that follows.
The exam covers all six changes of state with their correct names (melting, solidification, evaporation, condensation, sublimation, deposition), everyday examples, and at Secondary level adds gas compressibility and water's transition temperatures.
Revise the three states of matter with real examples in the exam below.
Physics & Chemistry · Primary, Secondary
Whether you are right or wrong, you see the scientific explanation. Learning does not stop at the mistake.
Questions use ice, chocolate, steam or a bathroom mirror. Connecting theory to real life fixes concepts better than any definition.
Primary covers basic concepts and main changes of state. Secondary adds sublimation, vaporisation, compressibility and transition temperatures.
"A Year 5 student learns that condensation is steam turning into droplets when she sees her mirror mist up after a shower. The question makes the connection."
Tricks and techniques to master this topic faster:
Memorise the 6 changes of state: Melting↑ Solidification↓ / Evaporation↑ Condensation↓ / Sublimation↑ Deposition↓
For Secondary: only gases are easily compressible — their molecules have free space between them.
Practise giving everyday examples for each change of state before taking the exam.
Boiling-point trick: water boils at 100°C, freezes at 0°C — the two most important numbers.
If you are studying States of Matter, these curriculum topics complement each other:
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