Interactive learning tool
Changes of State Simulator
Heat or cool a substance and watch how temperature, particle movement and state change together.
Explore temperature and state
What happens when energy is transferred?
Change the substance, then heat or cool it. The thermometer uses the same scale every time.
Choose a substance
Temperature
20 °C
200 °C
−220 °C
Gas
Liquid
Solid
100 °C
0 °C
Transfer energy
Liquid
Liquid:
Particles remain touching in an irregular arrangement and move around one another.
Temperature steady
Look closely:
The same 20 particles are used throughout. Heating changes their movement and attractions, not their size.
What you will practise
Connect energy, temperature and state
- Compare melting and boiling points for different substances.
- Observe two states together during a change of state.
- Explain why temperature stays constant during the transition.