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Water in Three States
Age 10 · Science
Water can be solid ice, liquid water, or a gas called water vapour. It changes between these states when it is heated or cooled, and the changes can go back and forth.
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Age 10: open this week
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In the picture
- Ice cubes in the bowl: water as a solid.
- Meltwater under the ice cubes: ice changing into liquid water as it warms.
- Water in the glass: water as a liquid.
- Steam from the pot and droplets on the glass lid: water turning into gas when heated and back into liquid when cooled.
Examples
- Ice cubes in a drink melt into liquid water.
- Steam from a kettle condenses into droplets on a cold window.
Key takeaways
- Heating ice melts it into liquid water; cooling liquid water enough freezes it back into ice.
- Heating liquid water makes water vapour; cooling water vapour condenses it back into liquid water.
Quiz: Water in Three States (Age 10)
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What happens to ice when it is heated?
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What happens to liquid water when it is heated?
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What happens to water vapour when it is cooled?
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