Mon Prof Augmenté
Water on a Round Trip
Age 10 · Science
Open to everyone until Monday, November 16
To keep it, print it while it is open.
Water can be a solid (ice), a liquid (water) or a gas (water vapour), and it changes from one to another when it warms up or cools down. In nature, these changes keep water moving in a big loop between the sea, the sky and the mountains.
In the picture
- Sea warmed by the sun: liquid water evaporates into water vapour, a gas
- Cloud above the mountain: water vapour cools and condenses into tiny droplets
- Snowy summit: in the cold, water freezes into solid snow and ice
- Melting glacier: ice melts into liquid water that flows back to the sea
Examples
- An ice cube left on a plate melts into a puddle, and water in the freezer turns back into ice.
- Drops form on a cold glass of juice when water vapour from the air condenses on it.
Key takeaways
- Heating makes ice melt and water evaporate; cooling makes vapour condense and water freeze.
- These changes are reversible: the same water can go back and forth between solid, liquid and gas.
Quiz: Water on a Round Trip (Age 10)
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What happens to water vapour when it cools down high in the sky?
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What happens to ice when it warms up?
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Water from a melting glacier flows back to the sea. Can that same water become a gas again?
The answers, each with its explanation, are in the app. This quiz is free there while the lesson is in the free week.
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