Exploring Hot and Cold Changes
![](https://wpsu.psu.edu/wp-content/uploads/2020/12/hot-and-cold.png)
Will a solid material melt? Can you change it back to solid again? Investigate what happens when you heat solid materials and then cool the materials.
Will a solid material melt? Can you change it back to solid again? Investigate what happens when you heat solid materials and then cool the materials.