Soup Molecules
Heating gives particles more energy, so they move faster on average; the fastest particles at a liquid's surface can escape as vapor, which is evaporation and can cool the liquid left behind.
ChemistryAges 10-13~8 min🎙️ Voice tutor
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What your child will figure out
- Use particle motion trails to identify which sample has the greater average speed and temperature.
- Predict and observe that heating increases average particle speed and surface escape without adding particles.
- Explain that an escaping particle remains matter as vapor and that losing a fastest particle can cool the liquid.
- Transfer the heat-speed-escape relationship to predict how sunshine affects puddle drying below boiling.
The levels
- Speed detective
Read motion trails to connect warmer temperature with greater average particle speed.
- Turn up the heat
Predict heating's effect, then observe faster motion and more surface escape.
- Surface escape
Identify a fast surface particle, follow it into vapor, and predict the cooling effect.
- Puddle forecast
Apply the particle model to two below-boiling puddles in sun and shade.
Ready when they are.
Play Soup Molecules free — no account, no card.
Play Soup Molecules free