Mon Prof Augmenté
Water on a windowsill
Age 12 · Science
A glass of ice cubes, a puddle, a steaming cup and a cold window pane sit together in one scene. Water moves between solid, liquid and gas as heat comes in or goes out.
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In the picture
- Ice cubes in the glass: solid water holding its own shape
- Puddle on the windowsill: liquid water spreading out flat
- Steam above the cup: warm water leaving as a gas
- Droplets on the cold pane: gas turning back into liquid water
Examples
- An ice lolly softening in the sun
- A bathroom mirror fogging up after a hot shower
Key takeaways
- Water changes state when it gains or loses heat, but it stays the same substance.
- Melting and evaporation take heat in; freezing and condensation give heat out.
Quiz: Water on a windowsill (Age 12)
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What happens when ice gains enough heat?
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What happens when liquid water loses enough heat?
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Which pair correctly describes evaporation and condensation?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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