Hypothesis: Heat is being absorbed and it can't be easily reversed back to a powder so that would make it a chemical change.
Equipment: Sample of ZnO, Hotplate, Scales, Heatproof container, Tongs, Heatproof mat.
Method:
1 Get a sample of ZnO in an evaporating dish
2 Weigh the ZnO and container then record weight
3 Heat container and ZnO on the hotplate
4 Observe any changes
5 Take off heat and put on a heatproof mat
6 Let it cool
7 Reweigh
After awhile of heating it up, it started changing colour. it changed to a light yellow and as it got hotter it became more orange. So in conclusion, it is a physical change because it easily reversed back to white when it cooled down. At first, I thought it would've been physical but then I though that it probably wouldn't easily be reversed.
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