Changing state: liquid to solid | Science | Quizalize & Oak National Academy

Starter quiz

The three common __________ are solid, liquid and gas.
- names of matter
- states of matter ✓
- versions of matter
Match the common name used for water to its state of matter.
- water
  
  ⇔
  
  liquid ✓
- ice
  
  ⇔
  
  solid ✓
- water vapour
  
  ⇔
  
  gas ✓
The process of a solid changing to a liquid is called ______.
- 'melting' ✓
Which of the following needs to change for solid water (ice) to melt?
- the noise level
- the brightness
- the pressure
- the temperature ✓
Which of the following would you use to measure temperature?
- a force meter
- a ruler
- a thermometer ✓
At what temperature does water change from a solid (ice) to a liquid? ______ °C.
- '0' ✓

Exit quiz

We can change the state of a liquid to a solid by decreasing its ______.
- 'temperature' ✓
We can use a thermometer to measure the __________ of a room.
- temperature ✓
- warmth
- coldness
What state is water in at room temperature?
- solid state
- liquid state ✓
- gas state
Different materials can be observed changing from liquid to solid when ______.
- cooled ✓
- heated
- moved
- stirred
If you cool down water in the liquid state, what state does it become?
- liquid (water)
- solid (ice) ✓
- gas (water vapour)
______ is the name of the process where liquid water changes to solid water (ice).
- 'Freezing' ✓

Worksheet

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Presentation

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Lesson Details

Key learning points

We can change the state of a liquid to a solid by changing its temperature.
Water is a liquid at room temperature but becomes a solid (ice) when it is cooled down.
The process in which a liquid changes to a solid is called freezing.
Different materials can be observed changing from liquid to solid when cooled.

Common misconception

Children think that materials can only change from a liquid to solid state at temperatures below 0°C. They also believe that the change is irreversible.

Teaching slides give examples of materials which change from their liquid to solid state at temperatures higher than room temperature. Through investigation, children will observe that the change between solid state and liquid state is reversible.

Keywords

State - Materials can exist in three common states of matter: solid, liquid and gas.
Solid - A solid has a fixed shape and volume but some solids can change shape when a force is applied.
Liquid - A liquid can flow, has a fixed volume and takes the shape of the bottom its container.
Freeze - To freeze is to change from a liquid state to a solid state.