After a rainy afternoon in Singapore, puddles dry up. Press a cold can of drink and it gets wet on the outside — but you never poured water on it!
Water is sneaky. It can disappear into the air and appear again. Today you'll become a Water Detective and learn the two big secrets: evaporation and condensation.
Tap Next to start your first case!
Evaporation is when liquid water gets warm and turns into an invisible gas called water vapour. The vapour floats up into the air, so the water seems to vanish.
Try it! Tap the sun to heat the puddle and watch the water escape.
Evaporation happens around you every day — especially when things are warm, windy, or spread out. Tap each card to reveal the answer.
Reveal all three cards to crack the case. 🔍
Condensation is the opposite. When invisible water vapour in the warm air touches something cold, it cools down and turns back into tiny water droplets you can see.
A cold drink has fog and droplets on the outside. Tap the droplets on the glass to collect them!
Droplets collected: 0 / 5
Drag each clue into the right box. Is it water leaving (evaporation) or water appearing (condensation)?
Tip: on a tablet, press a clue then press a box.
Evaporation and condensation are a team. One sends water UP into the air, the other brings it back DOWN as droplets.
Quick check — finish the sentence:
Steam from a hot kettle hitting a cold spoon and turning to water drops is…
You learned how water moves between liquid and gas:
Warm liquid water → invisible vapour. Water leaves into the air.
Vapour touches something cold → droplets you can see. Water comes back.
🏠 Find them at home: drying laundry (evaporation) and a foggy mirror after a hot shower (condensation).
Great work — you can now explain where water goes and how it comes back! 🌟