Changes in the state of materials
![](https://wowscience.co.uk/wp-content/uploads/2017/10/Changing-state-1.png)
![](https://wowscience.co.uk/wp-content/uploads/2017/10/Changing-state-3.png)
![](https://wowscience.co.uk/wp-content/uploads/2017/10/Changing-state-4.png)
![](https://wowscience.co.uk/wp-content/uploads/2017/10/Changing-state.png)
Watch different materials changing state. Which changes are reversible?
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Resource location:
http://www.bbc.co.uk/education/clips/zrkc87h
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